diff --git a/github/AuthenticatedUser.py b/github/AuthenticatedUser.py
index 9f9993d56a..efc331d2b6 100644
--- a/github/AuthenticatedUser.py
+++ b/github/AuthenticatedUser.py
@@ -973,9 +973,11 @@ def get_notifications(
 
         params = dict()
         if all is not github.GithubObject.NotSet:
-            params["all"] = all
+            # convert True, False to true, false for api parameters
+            params["all"] = str(all).lower() if isinstance(all, bool) else all
         if participating is not github.GithubObject.NotSet:
-            params["participating"] = participating
+            # convert True, False to true, false for api parameters
+            params["participating"] = str(participating).lower() if isinstance(participating, bool) else participating
         if since is not github.GithubObject.NotSet:
             params["since"] = since.strftime("%Y-%m-%dT%H:%M:%SZ")
         if before is not github.GithubObject.NotSet: