fixing dependencies

Author: Siba Rajendran

pyproject.toml

@@ -21,12 +21,12 @@ dependencies = [
     ## Pick up latest Git commit for bears package to ensure tests run:
     "bears @ git+https://github.com/amazon-science/bears.git@main",
     "requests",
-    "pyyaml",
+    "pyyaml==5.3.1",
     "urllib3",
     "langchain==0.3.20",
     "langchain-aws==0.2.15",
     "dspy==2.6.11",
-    "deepeval==2.5.2",
+    "deepeval==2.5.2,
     "json_repair==0.39.1",
     "Jinja2==3.1.6",
     "aiolimiter==1.2.1"