diff --git a/gradle.properties b/gradle.properties
index b07f9e98b..a5016e5ed 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -7,6 +7,6 @@ org.jetbrains.dokka.experimental.gradle.pluginMode=V2Enabled
 javaVersion=25
 mcVersion=26.1.1
 group=dev.slne.surf.api
-version=3.9.3
+version=3.9.4
 relocationPrefix=dev.slne.surf.api.libs
 snapshot=false
diff --git a/surf-api-paper/surf-api-paper-server/src/main/kotlin/dev/slne/surf/api/paper/server/inventory/framework/InventoryLoader.kt b/surf-api-paper/surf-api-paper-server/src/main/kotlin/dev/slne/surf/api/paper/server/inventory/framework/InventoryLoader.kt
index af53fca0c..b4374f5e5 100644
--- a/surf-api-paper/surf-api-paper-server/src/main/kotlin/dev/slne/surf/api/paper/server/inventory/framework/InventoryLoader.kt
+++ b/surf-api-paper/surf-api-paper-server/src/main/kotlin/dev/slne/surf/api/paper/server/inventory/framework/InventoryLoader.kt
@@ -5,6 +5,7 @@ import me.devnatan.inventoryframework.ViewFrame
 
 object InventoryLoader {
     init {
+        McVersionRemapper.remap()
         InventoryViewRemapper.remap()
         CloseContextRemapper.remap()
     }
diff --git a/surf-api-paper/surf-api-paper-server/src/main/kotlin/dev/slne/surf/api/paper/server/inventory/framework/McVersionRemapper.kt b/surf-api-paper/surf-api-paper-server/src/main/kotlin/dev/slne/surf/api/paper/server/inventory/framework/McVersionRemapper.kt
new file mode 100644
index 000000000..3d1a597f1
--- /dev/null
+++ b/surf-api-paper/surf-api-paper-server/src/main/kotlin/dev/slne/surf/api/paper/server/inventory/framework/McVersionRemapper.kt
@@ -0,0 +1,156 @@
+package dev.slne.surf.api.paper.server.inventory.framework
+
+import net.bytebuddy.ByteBuddy
+import net.bytebuddy.asm.AsmVisitorWrapper
+import net.bytebuddy.description.field.FieldDescription
+import net.bytebuddy.description.field.FieldList
+import net.bytebuddy.description.method.MethodList
+import net.bytebuddy.description.type.TypeDescription
+import net.bytebuddy.dynamic.ClassFileLocator
+import net.bytebuddy.dynamic.loading.ClassLoadingStrategy
+import net.bytebuddy.implementation.Implementation
+import net.bytebuddy.jar.asm.ClassVisitor
+import net.bytebuddy.jar.asm.MethodVisitor
+import net.bytebuddy.jar.asm.Opcodes
+import net.bytebuddy.pool.TypePool
+import net.bytebuddy.utility.OpenedClassReader
+import org.bukkit.Bukkit
+
+/**
+ * Remaps inventory-framework's McVersion parser to support Paper's new version format:
+ *
+ *   26.1.2.build.23-alpha
+ *
+ * inventory-framework 3.7.1 detects whether a patch version exists via a private method named
+ * `countColons`, which actually counts dots and expects exactly 3 dots for versions like:
+ *
+ *   1.21.11-R0.1-SNAPSHOT
+ *
+ * With the new Paper format, `26.1.2.build.23-alpha` contains 4 dots, so IF incorrectly parses it
+ * as `26.1` instead of `26.1.2`.
+ *
+ * This remapper replaces only the private static `countColons(String): Int` method with a parser
+ * that returns `3` whenever the Minecraft version part has a numeric patch component.
+ */
+object McVersionRemapper {
+
+    private const val MC_VERSION_INTERNAL =
+        "dev/slne/surf/api/libs/devnatan/inventoryframework/runtime/thirdparty/McVersion"
+
+    private const val REMAPPER_INTERNAL =
+        "dev/slne/surf/api/paper/server/inventory/framework/McVersionRemapper"
+
+    fun isRemapNecessary(): Boolean {
+        return try {
+            val version = Bukkit.getBukkitVersion()
+            version.contains(".build.") || hasNumericPatchVersionPart(version)
+        } catch (_: Throwable) {
+            false
+        }
+    }
+
+    fun remap() {
+        if (!isRemapNecessary()) return
+
+        val locator = ClassFileLocator.ForClassLoader.of(javaClass.classLoader)
+        val typePool = TypePool.Default.of(locator)
+        val typeDescription = typePool.describe(MC_VERSION_INTERNAL.replace("/", ".")).resolve()
+
+        ByteBuddy()
+            .redefine<Any>(typeDescription, locator)
+            .visit(McVersionClassVisitorWrapper())
+            .make()
+            .load(javaClass.classLoader, ClassLoadingStrategy.Default.INJECTION)
+    }
+
+    /**
+     * Replacement for inventory-framework's private static `countColons(String): Int`.
+     *
+     * Important: The original code checks `countColons(version) == 3` before parsing
+     * `version.split(".")[2]` as the patch number.
+     *
+     * Therefore this method deliberately returns:
+     * - `3` if the Minecraft version part has a numeric patch, e.g. `1.21.11` or `26.1.2`
+     * - `2` for patchless Paper build versions, e.g. `26.1.build.23-alpha`
+     * - the original dot count for legacy/non-build versions
+     */
+    @JvmStatic
+    @Suppress("unused")
+    fun countVersionDotsForPatchDetection(version: String): Int {
+        if (version.contains(".build.")) {
+            val mcVersionPart = version.substringBefore(".build.")
+            return if (hasNumericPatchVersionPart(mcVersionPart)) 3 else 2
+        }
+
+        return if (hasNumericPatchVersionPart(version)) {
+            3
+        } else {
+            version.count { it == '.' }
+        }
+    }
+
+    private fun hasNumericPatchVersionPart(version: String): Boolean {
+        val mcVersionPart = version.substringBefore('-')
+        val parts = mcVersionPart.split('.')
+
+        return parts.size >= 3 &&
+                parts[0].isNotEmpty() &&
+                parts[1].isNotEmpty() &&
+                parts[2].isNotEmpty() &&
+                parts[0].all(Char::isDigit) &&
+                parts[1].all(Char::isDigit) &&
+                parts[2].all(Char::isDigit)
+    }
+
+    private class McVersionClassVisitorWrapper : AsmVisitorWrapper {
+        override fun mergeWriter(flags: Int): Int = flags
+        override fun mergeReader(flags: Int): Int = flags
+
+        override fun wrap(
+            instrumentedType: TypeDescription,
+            classVisitor: ClassVisitor,
+            implementationContext: Implementation.Context,
+            typePool: TypePool,
+            fields: FieldList<FieldDescription.InDefinedShape?>,
+            methods: MethodList<*>,
+            writerFlags: Int,
+            readerFlags: Int
+        ): ClassVisitor {
+            return McVersionClassVisitor(classVisitor)
+        }
+    }
+
+    private class McVersionClassVisitor(
+        visitor: ClassVisitor
+    ) : ClassVisitor(OpenedClassReader.ASM_API, visitor) {
+
+        override fun visitMethod(
+            access: Int,
+            name: String,
+            descriptor: String,
+            signature: String?,
+            exceptions: Array<String>?
+        ): MethodVisitor? {
+            if (name == "countColons" && descriptor == "(Ljava/lang/String;)I") {
+                val mv = super.visitMethod(access, name, descriptor, signature, exceptions)
+
+                mv.visitCode()
+                mv.visitVarInsn(Opcodes.ALOAD, 0)
+                mv.visitMethodInsn(
+                    Opcodes.INVOKESTATIC,
+                    REMAPPER_INTERNAL,
+                    "countVersionDotsForPatchDetection",
+                    "(Ljava/lang/String;)I",
+                    false
+                )
+                mv.visitInsn(Opcodes.IRETURN)
+                mv.visitMaxs(1, 1)
+                mv.visitEnd()
+
+                return null
+            }
+
+            return super.visitMethod(access, name, descriptor, signature, exceptions)
+        }
+    }
+}
\ No newline at end of file