diff --git a/python_repositories/adapters/redis_adapter.py b/python_repositories/adapters/redis_adapter.py
index fc85c4f..660939d 100644
--- a/python_repositories/adapters/redis_adapter.py
+++ b/python_repositories/adapters/redis_adapter.py
@@ -62,12 +62,15 @@ class RedisAdapter(
         # Prepare arguments
         uri = str(os.getenv(self.uri_env_var_name))
         # Connect client
-        client = redis.Redis.from_url(
-            url=uri,
-            socket_connect_timeout=10,
-        )
-        if not client.ping():
-            raise ConnectionError(f"Could not connect to Redis at {uri}")
+        try:
+            client = redis.Redis.from_url(
+                url=uri,
+                socket_connect_timeout=10,
+            )
+            if not client.ping():
+                raise ConnectionError(f"Could not connect to Redis at {uri}")
+        except (redis.ConnectionError, redis.TimeoutError) as exc:
+            raise ConnectionError(f"Could not connect to Redis at {uri}") from exc
         # Persist client
         self._client = client
 
@@ -128,7 +131,7 @@ class RedisAdapter(
         self._client.json().delete(key)
         self.logger.debug(f"Deleted {key}")
 
-    async def _list_keys(self, pattern: str) -> list[str]:
+    def _list_keys(self, pattern: str) -> list[str]:
         """List keys in Redis matching a pattern."""
         # Check input
         if not isinstance(pattern, str) or len(pattern) == 0: