diff --git a/Dockerfile b/Dockerfile
index 4d2e126d7b28028119650655da7b66dd2410c575..c10511f46775d42e5cbff168237e1cbe685ba407 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM: python:3.8-buster
+FROM python:3.8-buster
 
 # Documentation static site generator & deployment tool
 RUN pip install mkdocs>=1.1.2