diff --git a/Dockerfile b/Dockerfile
index 335952d..7d3f78b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,8 +4,8 @@ COPY requirements.txt .
 RUN pip install -r requirements.txt
 
 RUN apt-get update && \
-    apt-get install -y curl && \
-    curl https://adoptopenjdk.jfrog.io/adoptopenjdk/api/gpg/key/public | apt-key add - && \
+    apt-get install -y gnupg2 curl && \
+    curl -s https://adoptopenjdk.jfrog.io/adoptopenjdk/api/gpg/key/public | apt-key add - && \
     add-apt-repository --yes https://adoptopenjdk.jfrog.io/adoptopenjdk/deb/ && \
     apt update && \
     apt install -y adoptopenjdk-11-openj9