diff --git a/app/assets/stylesheets/framework/selects.scss b/app/assets/stylesheets/framework/selects.scss
index 50f1445bc2e..621eec4f158 100644
--- a/app/assets/stylesheets/framework/selects.scss
+++ b/app/assets/stylesheets/framework/selects.scss
@@ -61,6 +61,11 @@
   border: 1px solid $dropdown-border-color;
   min-width: 175px;
   color: $gl-text-color;
+  z-index: 999;
+}
+
+.select2-drop-mask {
+  z-index: 998;
 }
 
 .select2-drop.select2-drop-above.select2-drop-active {
diff --git a/changelogs/unreleased/36160-zindex.yml b/changelogs/unreleased/36160-zindex.yml
new file mode 100644
index 00000000000..a836744fb41
--- /dev/null
+++ b/changelogs/unreleased/36160-zindex.yml
@@ -0,0 +1,5 @@
+---
+title: Decreases z-index of select2 to a lower number of our navigation bar
+merge_request:
+author:
+type: fixed