diff --git a/src/lib/components/parameters/ArticleModal.svelte b/src/lib/components/parameters/ArticleModal.svelte
index a083a5d299b44d450a6691bb1c3c81e7ee13b820..61fc5ab20ce7d54ade7b795d7c6852baa71fdded 100644
--- a/src/lib/components/parameters/ArticleModal.svelte
+++ b/src/lib/components/parameters/ArticleModal.svelte
@@ -42,7 +42,7 @@
 <Transition appear show={referenceUrl !== null}>
   <Dialog
     as="div"
-    class="fixed inset-0 z-20 overflow-y-auto"
+    class="fixed inset-0 z-40 overflow-y-auto"
     on:close={closeModal}
   >
     <div class="min-h-screen px-4 text-center">
diff --git a/src/lib/components/test_cases/TestCaseCompareModal.svelte b/src/lib/components/test_cases/TestCaseCompareModal.svelte
index 575ea58fa3dcc5c9963bfa08d8e1639989b70626..ef440373afbf93fcf1a304d03cb993efecc4bdc7 100644
--- a/src/lib/components/test_cases/TestCaseCompareModal.svelte
+++ b/src/lib/components/test_cases/TestCaseCompareModal.svelte
@@ -84,7 +84,7 @@
 <Transition appear show={isOpen}>
   <Dialog
     as="div"
-    class="fixed inset-0 z-20 overflow-y-auto"
+    class="fixed inset-0 z-40 overflow-y-auto"
     on:close={closeModal}
   >
     <div class="min-h-screen px-4 text-center">
diff --git a/src/lib/components/test_cases/TestCaseSelectModal.svelte b/src/lib/components/test_cases/TestCaseSelectModal.svelte
index f2f5afe10e4936957553c1c1d8dad8a05cedddbd..78234c44fa60522ece61ca37a029c55799c64d9d 100644
--- a/src/lib/components/test_cases/TestCaseSelectModal.svelte
+++ b/src/lib/components/test_cases/TestCaseSelectModal.svelte
@@ -48,7 +48,7 @@
 <Transition appear show={isOpen}>
   <Dialog
     as="div"
-    class="fixed inset-0 z-30 overflow-y-auto"
+    class="fixed inset-0 z-40 overflow-y-auto"
     on:close={closeModal}
   >
     <div class="min-h-screen px-4 text-center">
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index e208e705655caead2bedda95ed301d1117850061..cb56d6c1c468b3ee4a88da9c39b9e03d1a015384 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -1057,7 +1057,7 @@
     >
       <!--en-tête-->
       <div
-        class="sticky top-0 z-30 mb-4 flex flex-col border-b bg-yellow-50 md:pl-3 md:pr-6 lg:pl-5 lg:pr-8"
+        class="sticky top-0 z-25 mb-4 flex flex-col border-b bg-yellow-50 md:pl-3 md:pr-6 lg:pl-5 lg:pr-8"
       >
         <!--
           <select
diff --git a/tailwind.config.cjs b/tailwind.config.cjs
index a2a469913d74dc7069f045ee2a5d1846efcff496..5b3bcec0edd689b60d1eb3610e20ec351acad0d0 100644
--- a/tailwind.config.cjs
+++ b/tailwind.config.cjs
@@ -48,6 +48,9 @@ const config = {
         "le-vert-validation": "#13CC03",
         "le-vert-validation-dark": "#377330",
       },
+      zIndex: {
+        '25': '25',
+      }
     },
     fontFamily: {
       sans: ["Lato", "sans-serif"],