diff --git a/CHANGES/pulp-glue/+cache_file.bugfix b/CHANGES/pulp-glue/+cache_file.bugfix
new file mode 100644
index 000000000..695bdeefc
--- /dev/null
+++ b/CHANGES/pulp-glue/+cache_file.bugfix
@@ -0,0 +1 @@
+Sanitize the filename of the chached `api.json`.
diff --git a/pulp-glue/src/pulp_glue/common/openapi.py b/pulp-glue/src/pulp_glue/common/openapi.py
index 53aafe538..8b5074654 100644
--- a/pulp-glue/src/pulp_glue/common/openapi.py
+++ b/pulp-glue/src/pulp_glue/common/openapi.py
@@ -216,8 +216,10 @@ def load_api(self, refresh_cache: bool = False) -> None:
         apidoc_cache: str = os.path.join(
             os.path.expanduser(xdg_cache_home),
             "squeezer",
-            (self._base_url + "_" + self._doc_path).replace(":", "_").replace("/", "_")
-            + "api.json",
+            (self._base_url + "_" + self._doc_path)
+            .replace(":", "_")
+            .replace("/", "_")
+            .replace("?", "_"),
         )
         try:
             if refresh_cache: