diff --git a/Dockerfile b/Dockerfile
index 5b5cd4f19..23689f03c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -106,7 +106,8 @@ RUN if [ -f requirements.txt ]; then \
         qifparse \
         pypdf \
         phonenumbers \
-        python-docx
+        python-docx \
+        pyzk
 
 # ------------------------------------------------------------------
 # Create Required Directories