diff --git a/build_all_targets b/build_all_targets
index d9f2674..66cf94b 100755
--- a/build_all_targets
+++ b/build_all_targets
@@ -5,6 +5,9 @@ FEED="$2"
 OUTPUT_DIR="$3"
 BUILD_PARALLEL="$4"
 
+MAX_JOBS=8
+CUR_JOBS=0
+
 # check for dependencies
 DEPS="docker-hub docker"
 
@@ -53,9 +56,13 @@ archs+=( ["x86_64"]=x86-64 )
 for key in ${!archs[@]}; do
 	SDK="${archs[${key}]}"
 	[ "$OPENWRT_VERSION" != "snapshot" ] && SDK+="-$OPENWRT_VERSION"
-	if [ -n "$BUILD_PARALLEL" ]; then
+	if [ -n "$BUILD_PARALLEL" ] ; then
+		CUR_JOBS=$(( $CUR_JOBS + 1 ))
 		(./build_feed "$SDK" "$FEED" "$OUTPUT_DIR" PARALLEL) &
 	else
 		./build_feed "$SDK" "$FEED" "$OUTPUT_DIR"
 	fi
+	while [ $CUR_JOBS -ge $MAX_JOBS ]; do
+		sleep 20
+	done
 done