diff --git a/src/theme.js b/src/theme.js
index 62539b6..59fd316 100644
--- a/src/theme.js
+++ b/src/theme.js
@@ -168,6 +168,7 @@ function getTheme({ style, name }) {
       "welcomePage.buttonBackground": primer.gray[1],
       "welcomePage.buttonHoverBackground": primer.gray[2],
     },
+    semanticHighlighting: true,
     tokenColors: [
       {
         scope: ["comment", "punctuation.definition.comment", "string.comment"],
diff --git a/themes/dark.json b/themes/dark.json
index 7965c12..feb4a75 100644
--- a/themes/dark.json
+++ b/themes/dark.json
@@ -134,6 +134,7 @@
     "welcomePage.buttonBackground": "#2f363d",
     "welcomePage.buttonHoverBackground": "#444d56"
   },
+  "semanticHighlighting": true,
   "tokenColors": [
     {
       "scope": [
diff --git a/themes/light.json b/themes/light.json
index be22ee0..acf794f 100644
--- a/themes/light.json
+++ b/themes/light.json
@@ -134,6 +134,7 @@
     "welcomePage.buttonBackground": "#f6f8fa",
     "welcomePage.buttonHoverBackground": "#e1e4e8"
   },
+  "semanticHighlighting": true,
   "tokenColors": [
     {
       "scope": [