diff --git a/Dockerfile b/Dockerfile
index 0f56f30..e1919b0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,12 @@
 FROM debian:10-slim
 ENV LANG C.UTF-8
-COPY adoptopenjdk.gpg /etc/apt/trusted.gpg.d/
-RUN apt-get update && \
-  apt-get install -y apt-transport-https ca-certificates && \
-  echo 'deb https://adoptopenjdk.jfrog.io/adoptopenjdk/deb buster main' > /etc/apt/sources.list.d/adoptopenjdk.list && \
+RUN mkdir -p /usr/share/man/man1 && \
   apt-get update && \
-  mkdir -p /usr/share/man/man1 && \
-  apt-get install -y --no-install-recommends adoptopenjdk-8-hotspot && \
-  apt-get install -y --no-install-recommends gcc libc6-dev libgl1-mesa-dev libxt-dev maven && \
-  apt-get autoremove --purge -y && \
+  apt-get install -y --no-install-recommends \
+    gcc \
+    libc6-dev \
+    libgl1-mesa-dev \
+    libxt-dev \
+    maven \
+    openjdk-11-jdk && \
   rm -rf /var/lib/apt/lists/*
diff --git a/adoptopenjdk.gpg b/adoptopenjdk.gpg
deleted file mode 100644
index a5aee1f..0000000
Binary files a/adoptopenjdk.gpg and /dev/null differ