diff --git a/code-formatter/Dockerfile b/code-formatter/Dockerfile
index 51a4bcc..011bf63 100644
--- a/code-formatter/Dockerfile
+++ b/code-formatter/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:8-stretch
+FROM node:10-slim
 
 # https support
 RUN apt-get update && \
diff --git a/code-formatter/Dockerfile.56 b/code-formatter/Dockerfile.56
index 5886cf7..1c7a1bb 100644
--- a/code-formatter/Dockerfile.56
+++ b/code-formatter/Dockerfile.56
@@ -1,4 +1,4 @@
-FROM node:8-slim
+FROM node:10-slim
 
 # https support
 RUN apt-get update && \
diff --git a/code-formatter/src/inc/variables.shinc b/code-formatter/src/inc/variables.shinc
index 5529719..1aa6b6c 100644
--- a/code-formatter/src/inc/variables.shinc
+++ b/code-formatter/src/inc/variables.shinc
@@ -32,7 +32,7 @@ __initVariables() {
 					CSS_FILES+=("${1}")
 				fi
 				;;
-			*.js|*.jsx|*.ts)
+			*.js|*.jsx|*.ts|*.json)
 				__path_exists "${1}"
 				if [[ $? -ne 0 ]]; then
 					__err "Specified path does not exist: ${1}"