diff --git a/app/services/tcgplayer.py b/app/services/tcgplayer.py
index 3f1052f..48e511b 100644
--- a/app/services/tcgplayer.py
+++ b/app/services/tcgplayer.py
@@ -121,20 +121,45 @@ class TCGPlayerService:
             return None
 
     def is_in_docker(self) -> bool:
-        """Check if we're running inside a Docker container"""
+        """Check if we're running inside a Docker container using multiple methods"""
+        # Method 1: Check cgroup
         try:
             with open('/proc/1/cgroup', 'r') as f:
-                content = f.read()
-                is_docker = 'docker' in content
-                logger.debug(f"Docker detection via cgroup: {is_docker}")
-                return is_docker
+                content = f.read().lower()
+                if any(container_id in content for container_id in ['docker', 'containerd', 'kubepods']):
+                    logger.debug("Docker detected via cgroup")
+                    return True
         except Exception as e:
             logger.debug(f"Could not read cgroup file: {e}")
-            # If we can't read the file, check for common Docker env vars
-            env_check = bool(os.environ.get('DOCKER_CONTAINER', False) or 
-                            os.environ.get('IN_DOCKER', False))
-            logger.debug(f"Docker detection via env vars: {env_check}")
-            return env_check
+
+        # Method 2: Check /.dockerenv file
+        if os.path.exists('/.dockerenv'):
+            logger.debug("Docker detected via /.dockerenv file")
+            return True
+
+        # Method 3: Check environment variables
+        docker_env = any(os.environ.get(var, False) for var in [
+            'DOCKER_CONTAINER',
+            'IN_DOCKER',
+            'KUBERNETES_SERVICE_HOST',  # For k8s
+            'DOCKER_HOST'
+        ])
+        if docker_env:
+            logger.debug("Docker detected via environment variables")
+            return True
+
+        # Method 4: Check container runtime
+        try:
+            with open('/proc/self/mountinfo', 'r') as f:
+                content = f.read().lower()
+                if any(rt in content for rt in ['docker', 'containerd', 'kubernetes']):
+                    logger.debug("Docker detected via mountinfo")
+                    return True
+        except Exception as e:
+            logger.debug(f"Could not read mountinfo: {e}")
+
+        logger.debug("No Docker environment detected")
+        return False
             
     def _send_request(self, url: str, method: str, data=None, except_302=False) -> requests.Response:
         """Send a request with the specified cookies"""