diff --git a/.build.yml b/.build.yml
index 8e2ef11..331779c 100644
--- a/.build.yml
+++ b/.build.yml
@@ -26,6 +26,7 @@ tasks:
       shellcheck hyperterm/hyperterm/themes/light_theme.sh
       shellcheck hyperterm/hyperterm/themes/minterm.sh
       shellcheck hyperterm/hyperterm/themes/pure.sh
+      shellcheck hyperterm/hyperterm/themes/simple.sh
       shellcheck hyperterm/hyperterm/themes/special.sh
   - tools: |
       shellcheck hyperterm/hyperterm/tools/aliases.sh
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f84c804..48dbc28 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -47,6 +47,7 @@ themes:
     - shellcheck hyperterm/themes/light_theme.sh
     - shellcheck hyperterm/themes/minterm.sh
     - shellcheck hyperterm/themes/pure.sh
+    - shellcheck hyperterm/themes/simple.sh
     - shellcheck hyperterm/themes/special.sh
 
 tools: