diff --git a/Dockerfile b/Dockerfile
index c911d04..a191617 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,8 @@ LABEL AlternativeImageName="wollud1969/build-env-java"
 
 
 RUN \
+  apt update && \
+  apt install software-properties-common && \
   curl https://adoptopenjdk.jfrog.io/adoptopenjdk/api/gpg/key/public > adoptopenjdk.key && \
   apt-key add adoptopenjdk.key && \
   add-apt-repository --yes https://adoptopenjdk.jfrog.io/adoptopenjdk/deb/ && \