diff --git a/docker.arm64.sh b/docker.arm64.sh
index c1318d6..c17c430 100644
--- a/docker.arm64.sh
+++ b/docker.arm64.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-VERSION=$(cat package.json | grep -E '"version"' | tr -d \")
+VERSION=$(grep -o '\"version\": \"[^\"]*\"' package.json | sed 's/[^0-9.]//g')
 LATEST="latest"
 
 # if branch is unstable in git for circle ci
diff --git a/docker.sh b/docker.sh
index 344855c..32ac9e3 100644
--- a/docker.sh
+++ b/docker.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-VERSION=$(cat package.json | grep -E '"version"' | tr -d \")
+VERSION=$(grep -o '\"version\": \"[^\"]*\"' package.json | sed 's/[^0-9.]//g')
 LATEST="latest"
 
 # if branch is unstable in git for circle ci