diff --git a/pyproject.toml b/pyproject.toml
index 70280ebc..e472ed25 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,18 +45,13 @@ Changelog = "https://github.com/pydot/pydot/blob/master/ChangeLog"
 
 [project.optional-dependencies]
 dev = [
-  'chardet',
-  'black',
-  'parameterized',
+  'chardet==5.2.0',
+  'black==24.1.1',
+  'tox==4.14.2',
+  'parameterized==0.9.0',
+  'unittest-parallel==1.6.1',
 ]
-tests = [
-  'chardet',
-  'black',
-  'tox',
-  'parameterized',
-  'unittest-parallel',
-]
-release = ['zest.releaser[recommended]']
+release = ['zest.releaser[recommended]==9.1.3']
 
 [tool.black]
 line-length = 79