diff --git a/packages/symbol_table/pubspec.yaml b/packages/symbol_table/pubspec.yaml
index bc90e868..0c605c46 100644
--- a/packages/symbol_table/pubspec.yaml
+++ b/packages/symbol_table/pubspec.yaml
@@ -1,5 +1,3 @@
-dependencies:
-  collection: ^1.15.0-nullsafety.4
 name: symbol_table
 version: 2.0.0
 description: A generic symbol table implementation in Dart, with support for scopes and constants.
@@ -7,5 +5,7 @@ author: Tobe O <thosakwe@gmail.com>
 homepage: https://github.com/thosakwe/symbol_table
 environment:
   sdk: '>=2.12.0 <3.0.0'
+dependencies:
+  collection: ^1.15.0  
 dev_dependencies:
   test: ^1.15.7
\ No newline at end of file