diff --git a/appveyor.yml b/appveyor.yml
index e36e90e..d9f46e7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,6 +3,7 @@ image: ubuntu1804
 build: off
 
 install:
+  - sudo apt-get update
   - sudo apt-get install -y python3-pip
 
 build_script: