diff --git a/gradle/changelog/valid_CSS.yaml b/gradle/changelog/valid_CSS.yaml
new file mode 100644
index 0000000000..413d4960f8
--- /dev/null
+++ b/gradle/changelog/valid_CSS.yaml
@@ -0,0 +1,2 @@
+- type: fixed
+  description: separate definition of padding to produce valid CSS ([#2023](https://github.com/scm-manager/scm-manager/pull/2023))
diff --git a/scm-ui/ui-syntaxhighlighting/src/syntax-highlighting.module.css b/scm-ui/ui-syntaxhighlighting/src/syntax-highlighting.module.css
index 1d984f186c..2533bacbd9 100644
--- a/scm-ui/ui-syntaxhighlighting/src/syntax-highlighting.module.css
+++ b/scm-ui/ui-syntaxhighlighting/src/syntax-highlighting.module.css
@@ -183,7 +183,9 @@ pre[class*="language-"] > code[class*="language-"] {
   position: absolute;
   left: 0;
   right: 0;
-  padding: inherit 0;
+  padding: inherit;
+  padding-left: 0;
+  padding-right: 0;
   margin-top: 1em;
   background: var(--sh-highlight-background);
   box-shadow: inset 5px 0 0 var(--sh-highlight-accent);