diff --git a/src/.docker_modules/gatk/3.8.0/Dockerfile b/src/.docker_modules/gatk/3.8.0/Dockerfile
index 41d27614ab15c4b9fee29eadc88a93972304c110..2ef48edd5c589a52769ec6ee6edef38cd2b903fa 100644
--- a/src/.docker_modules/gatk/3.8.0/Dockerfile
+++ b/src/.docker_modules/gatk/3.8.0/Dockerfile
@@ -5,3 +5,4 @@ ENV GATK_VERSION=3.8.0
 
 RUN echo "#\!/bin/sh\njava -jar /usr/GenomeAnalysisTK.jar \$@" > /bin/gatk3 
 RUN chmod +x /bin/gatk3
+RUN sed -i 's/java/java -Xmx40g/g' /bin/gatk3
diff --git a/src/.docker_modules/picard/2.18.11/PicardCommandLine b/src/.docker_modules/picard/2.18.11/PicardCommandLine
index 24e2d2ac4a4e633e7a158ed68e7f8d6ed90fc90b..c8eebf8345906cae9ef2e63409500857de479f09 100644
--- a/src/.docker_modules/picard/2.18.11/PicardCommandLine
+++ b/src/.docker_modules/picard/2.18.11/PicardCommandLine
@@ -12,4 +12,4 @@ PicardCommandLine)
         ;;
 esac
 
-exec java -Xmx12g ${JAVA_OPTIONS-} -jar /usr/share/java/picard.jar "$@"
+exec java -Xmx40g ${JAVA_OPTIONS-} -jar /usr/share/java/picard.jar "$@"