diff --git a/backend/scripts/install-java.sh b/backend/scripts/install-java.sh
index 9862fd45..d928ae02 100755
--- a/backend/scripts/install-java.sh
+++ b/backend/scripts/install-java.sh
@@ -4,8 +4,9 @@
 touch /tmp/install-java.lock
 
 # install java
-rm -r /var/lib/apt/lists/*
-apt-get update && apt-get install -y -f default-jdk
+apt-get clean && \
+	apt-get update --fix-missing && \
+	apt-get install -y --fix-missing default-jdk
 ln -s /usr/bin/java /usr/local/bin/java
 
 # unlock