diff --git a/package-lock.json b/package-lock.json
index c7234a5afc..8e5099545c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -22,7 +22,7 @@
         "@eslint/js": "^8.49.0",
         "@typescript-eslint/eslint-plugin": "^6.7.2",
         "@typescript-eslint/parser": "^6.7.2",
-        "blockly": "^12.0.0",
+        "blockly": "^13.0.0-beta.4",
         "conventional-changelog-conventionalcommits": "^5.0.0",
         "eslint": "^8.49.0",
         "eslint-config-google": "^0.14.0",
@@ -49,6 +49,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/backpack-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/blockly-angular": {
       "name": "blockly-angular-sample",
       "version": "0.0.0",
@@ -149,6 +161,18 @@
         "node": ">= 10"
       }
     },
+    "examples/blockly-rtc/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/blockly-rtc/node_modules/brace-expansion": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.2.tgz",
@@ -388,6 +412,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/custom-dialogs-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/custom-generator-codelab": {
       "name": "generator-sample-app",
       "version": "1.0.0",
@@ -405,6 +441,18 @@
         "webpack-dev-server": "^5.0.4"
       }
     },
+    "examples/custom-generator-codelab/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/custom-renderer-codelab": {
       "name": "renderer-sample-app",
       "version": "1.0.0",
@@ -422,6 +470,18 @@
         "webpack-dev-server": "^5.0.4"
       }
     },
+    "examples/custom-renderer-codelab/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/custom-tooltips-demo": {
       "name": "blockly-custom-tooltips-demo",
       "version": "0.0.0",
@@ -429,6 +489,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/custom-tooltips-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/developer-tools": {
       "version": "1.0.0",
       "license": "Apache-2.0",
@@ -451,6 +523,18 @@
         "webpack-dev-server": "^5.0.4"
       }
     },
+    "examples/developer-tools/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/devsite-demo": {
       "name": "blockly-devsite-demo",
       "version": "0.0.0",
@@ -458,6 +542,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/devsite-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/devsite-landing-demo": {
       "name": "blockly-devsite-landing-demo",
       "version": "0.0.0",
@@ -465,6 +561,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/devsite-landing-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/fixed-demo": {
       "name": "blockly-fixed-demo",
       "version": "0.0.0",
@@ -472,6 +580,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/fixed-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/generator-demo": {
       "name": "blockly-generator-demo",
       "version": "0.0.0",
@@ -479,6 +599,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/generator-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/graph-demo": {
       "name": "blockly-graph-demo",
       "version": "0.0.0",
@@ -486,6 +618,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/graph-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/headless-demo": {
       "name": "blockly-headless-demo",
       "version": "0.0.0",
@@ -493,6 +637,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/headless-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/interpreter-demo": {
       "name": "blockly-interpreter-demo",
       "version": "0.0.0",
@@ -500,6 +656,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/interpreter-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/max-blocks-demo": {
       "name": "blockly-max-blocks-demo",
       "version": "0.0.0",
@@ -507,6 +675,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/max-blocks-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/mirror-demo": {
       "name": "blockly-mirror-demo",
       "version": "0.0.0",
@@ -514,6 +694,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/mirror-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/pitch-field-demo": {
       "name": "blockly-pitch-field-demo",
       "version": "0.0.0",
@@ -521,6 +713,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/pitch-field-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/resizable-demo": {
       "name": "blockly-resizable-demo",
       "version": "0.0.0",
@@ -528,6 +732,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/resizable-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/rtl-demo": {
       "name": "blockly-rtl-demo",
       "version": "0.0.0",
@@ -535,6 +751,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/rtl-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/sample-app": {
       "version": "1.0.0",
       "license": "Apache-2.0",
@@ -570,12 +798,48 @@
         "webpack-dev-server": "^5.0.4"
       }
     },
+    "examples/sample-app-ts/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "examples/sample-app/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/single-direction-scroll-demo": {
       "version": "0.0.0",
       "dependencies": {
         "blockly": "^12.0.0"
       }
     },
+    "examples/single-direction-scroll-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/toolbox-demo": {
       "name": "blockly-toolbox-demo",
       "version": "0.0.0",
@@ -583,6 +847,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/toolbox-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "examples/turtle-field-demo": {
       "name": "blockly-turtle-field-demo",
       "version": "0.0.0",
@@ -590,6 +866,18 @@
         "blockly": "^12.0.0"
       }
     },
+    "examples/turtle-field-demo/node_modules/blockly": {
+      "version": "12.5.1",
+      "resolved": "https://registry.npmjs.org/blockly/-/blockly-12.5.1.tgz",
+      "integrity": "sha512-etXLpUtEkcRibHGwIJ4BsvnIzMJJs0C0yPIjE/W0NCtj8ACha/a7Q9n7Ib6+j7N4EzQ0p28YPZMnypi5pNIj1g==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "jsdom": "26.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@aashutoshrathi/word-wrap": {
       "version": "1.2.6",
       "resolved": "https://registry.npmjs.org/@aashutoshrathi/word-wrap/-/word-wrap-1.2.6.tgz",
@@ -619,11 +907,12 @@
       "license": "ISC"
     },
     "node_modules/@babel/code-frame": {
-      "version": "7.27.1",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.27.1.tgz",
-      "integrity": "sha512-cjQ7ZlQ0Mv3b47hABuTevyTuYN4i+loJKGeV9flcCgIK37cCXRh+L1bd3iBHlynerhQ7BhCkn2BPbQUL+rGqFg==",
+      "version": "7.29.0",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.0.tgz",
+      "integrity": "sha512-9NhCeYjq9+3uxgdtp20LSiJXJvN0FeCtNGpJxuMFZ1Kv3cWUNb6DOhJwUvcVCzKGR66cw4njwM6hrJLqgOwbcw==",
+      "license": "MIT",
       "dependencies": {
-        "@babel/helper-validator-identifier": "^7.27.1",
+        "@babel/helper-validator-identifier": "^7.28.5",
         "js-tokens": "^4.0.0",
         "picocolors": "^1.1.1"
       },
@@ -659,22 +948,10 @@
       }
     },
     "node_modules/@babel/helper-validator-identifier": {
-      "version": "7.27.1",
-      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.27.1.tgz",
-      "integrity": "sha512-D2hP9eA+Sqx1kBZgzxZh0y1trbuU+JoDkiEwqhQ36nodYqJwyEIhPSdMNd7lOm/4io72luTPWH20Yda0xOuUow==",
-      "engines": {
-        "node": ">=6.9.0"
-      }
-    },
-    "node_modules/@babel/highlight": {
-      "version": "7.22.20",
-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.22.20.tgz",
-      "integrity": "sha512-dkdMCN3py0+ksCgYmGG8jKeGA/8Tk+gJwSYYlFGxG5lmhfKNoAy004YpLxpS1W2J8m/EK2Ew+yOs9pVRwO89mg==",
-      "dependencies": {
-        "@babel/helper-validator-identifier": "^7.22.20",
-        "chalk": "^2.4.2",
-        "js-tokens": "^4.0.0"
-      },
+      "version": "7.28.5",
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-          "version": "8.1.1",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-8.1.1.tgz",
-          "integrity": "sha512-MpUEN2OodtUzxvKQl72cUF7RQ5EiHsGvSsVG0ia9c5RbWGL2CI4C7EpPS8UTBIplnlzZiNuV56w+FuNxy3ty2Q==",
-          "requires": {
-            "has-flag": "^4.0.0"
-          }
-        }
       }
     },
     "text-decoder": {
@@ -44796,9 +45117,9 @@
       "dev": true
     },
     "update-browserslist-db": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.1.3.tgz",
-      "integrity": "sha512-UxhIZQ+QInVdunkDAaiazvvT/+fXL5Osr0JZlJulepYu6Jd7qJtDZjlur0emRlT71EN3ScPoE7gvsuIKKNavKw==",
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.2.3.tgz",
+      "integrity": "sha512-Js0m9cx+qOgDxo0eMiFGEueWztz+d4+M3rGlmKPT+T4IS/jP4ylw3Nwpu6cpTTP8R1MAC1kF4VbdLt3ARf209w==",
       "requires": {
         "escalade": "^3.2.0",
         "picocolors": "^1.1.1"
diff --git a/package.json b/package.json
index 16644b0f0e..f9d3d247e8 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "@eslint/js": "^8.49.0",
     "@typescript-eslint/eslint-plugin": "^6.7.2",
     "@typescript-eslint/parser": "^6.7.2",
-    "blockly": "^12.0.0",
+    "blockly": "^13.0.0-beta.4",
     "conventional-changelog-conventionalcommits": "^5.0.0",
     "eslint": "^8.49.0",
     "eslint-config-google": "^0.14.0",
diff --git a/plugins/scroll-options/src/ScrollBlockDragger.ts b/plugins/scroll-options/src/ScrollBlockDragger.ts
index 670942099d..241a5a161f 100644
--- a/plugins/scroll-options/src/ScrollBlockDragger.ts
+++ b/plugins/scroll-options/src/ScrollBlockDragger.ts
@@ -190,7 +190,7 @@ export class ScrollBlockDragger extends Blockly.dragging.Dragger {
     if (!isAutoScrollable(this.draggable)) return;
 
     const mouse = Blockly.utils.svgMath.screenToWsCoordinates(
-      this.workspace,
+      this.draggable.workspace,
       new Blockly.utils.Coordinate(e.clientX, e.clientY),
     );
 
@@ -206,7 +206,9 @@ export class ScrollBlockDragger extends Blockly.dragging.Dragger {
     };
 
     // Get ViewMetrics in workspace coordinates.
-    const viewMetrics = this.workspace.getMetricsManager().getViewMetrics(true);
+    const viewMetrics = this.draggable.workspace
+      .getMetricsManager()
+      .getViewMetrics(true);
 
     // Get possible scroll velocities based on the location of both the block
     // and the mouse.
@@ -229,7 +231,7 @@ export class ScrollBlockDragger extends Blockly.dragging.Dragger {
 
     // Update the autoscroll or start a new one.
     this.activeAutoScroll_ =
-      this.activeAutoScroll_ || new AutoScroll(this.workspace, this);
+      this.activeAutoScroll_ || new AutoScroll(this.draggable.workspace, this);
     this.activeAutoScroll_.updateProperties(overallScrollVector);
   }
 
diff --git a/plugins/theme-highcontrast/src/index.ts b/plugins/theme-highcontrast/src/index.ts
index 4c19c39aaf..b8030874e7 100644
--- a/plugins/theme-highcontrast/src/index.ts
+++ b/plugins/theme-highcontrast/src/index.ts
@@ -90,7 +90,6 @@ export default Blockly.Theme.defineTheme('highcontrast', {
   componentStyles: {
     selectedGlowColour: '#000000',
     // selectedGlowSize: 1,
-    replacementGlowColour: '#000000',
   },
   fontStyle: {
     family: undefined, // Use default font-family.
diff --git a/plugins/workspace-backpack/src/backpack_helpers.ts b/plugins/workspace-backpack/src/backpack_helpers.ts
index e7a8335304..315d96fc94 100644
--- a/plugins/workspace-backpack/src/backpack_helpers.ts
+++ b/plugins/workspace-backpack/src/backpack_helpers.ts
@@ -46,6 +46,7 @@ function registerEmptyBackpack(workspace: Blockly.WorkspaceSvg) {
         workspace,
       },
       weight: 0,
+      id: 'empty_backpack',
     };
     menuOptions.push(backpackOptions);
   };