diff --git a/Dockerfile b/Dockerfile
index 9b67408..94b27b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,4 +18,4 @@ WORKDIR "/app"
 
 COPY . .
 
-CMD ["./main.py"]
+ENTRYPOINT ["./main.py"]
diff --git a/card.py b/card.py
index 3309de7..c591ec6 100644
--- a/card.py
+++ b/card.py
@@ -66,7 +66,11 @@ class Card:
 
     # download and resize card image
     def get_image(self, resolution):
-        response = requests.get(self._iurl)
+        try:
+            response = requests.get(self._iurl)
+        except:
+            return False
+
         im = Image.open(BytesIO(response.content))
         im = im.convert("RGB")
         im = im.resize(resolution, Image.BICUBIC)
diff --git a/main.py b/main.py
index 26e515f..8ffaab5 100755
--- a/main.py
+++ b/main.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 
 import argparse
 import json
diff --git a/opus.py b/opus.py
index 3f60e0b..fe45932 100644
--- a/opus.py
+++ b/opus.py
@@ -27,9 +27,12 @@ class imageLoader(threading.Thread):
             # take next card
             i, card = self.__queue.get()
 
-            # fetch card image
-            logger.info("get image for card {}".format(card))
-            im = card.get_image(self.__resolution)
+            # fetch card image (retry on fail)
+            while True:
+                logger.info("get image for card {}".format(card))
+                im = card.get_image(self.__resolution)
+                if im:
+                    break
 
             # paste image in correct position
             self.__lock.acquire()