diff --git a/packages/definitions-parser/allowedPackageJsonDependencies.txt b/packages/definitions-parser/allowedPackageJsonDependencies.txt
index d4bbc0a979..c06274b3d0 100644
--- a/packages/definitions-parser/allowedPackageJsonDependencies.txt
+++ b/packages/definitions-parser/allowedPackageJsonDependencies.txt
@@ -785,6 +785,7 @@ preact
 prettier
 pretty-format
 probot
+proj4
 prom-client
 prosemirror-view
 protobufjs