diff --git a/_includes/img-url.html b/_includes/img-url.html
index 1483652..2f8d401 100644
--- a/_includes/img-url.html
+++ b/_includes/img-url.html
@@ -29,9 +29,9 @@
     %}
 
     {% if include.absolute %}
-      {% assign url = site.url | append: site.base_url | append: url %}
+      {% assign url = site.url | append: site.baseurl | append: url %}
     {% else %}
-      {% assign url = site.base_url | append: url %}
+      {% assign url = site.baseurl | append: url %}
     {% endif %}
   {% endunless %}
 {%- endif -%}
diff --git a/tools/release b/tools/release
index bb54a0b..9ca63dc 100755
--- a/tools/release
+++ b/tools/release
@@ -151,8 +151,10 @@ branch() {
   fi
 }
 
-## Build a gem package
+## Build a Gem package
 build_gem() {
+  git checkout "$PROD_BRANCH"
+
   # Remove unnecessary theme settings
   sed -i "s/^img_cdn:.*/img_cdn:/;s/^avatar:.*/avatar:/" _config.yml
   rm -f ./*.gem
@@ -168,6 +170,9 @@ build_gem() {
 
   # restore the dist files for future development
   mkdir -p "$JS_DIST" && cp "$BACKUP_PATH"/* "$JS_DIST"
+
+  # back to the default branch
+  git checkout "$DEFAULT_BRANCH"
 }
 
 main() {