diff --git a/src/themes/duotoneDark.js b/src/themes/duotoneDark.js
index 54441e1..7c2e441 100755
--- a/src/themes/duotoneDark.js
+++ b/src/themes/duotoneDark.js
@@ -61,7 +61,7 @@ var theme: PrismTheme = {
         "unit",
         "statement",
         "regex",
-        "at-rule",
+        "atrule",
         "placeholder",
         "variable",
       ],
diff --git a/src/themes/duotoneLight.js b/src/themes/duotoneLight.js
index 8dcbdd2..a9ea232 100755
--- a/src/themes/duotoneLight.js
+++ b/src/themes/duotoneLight.js
@@ -61,7 +61,7 @@ var theme: PrismTheme = {
         "unit",
         "statement",
         "regex",
-        "at-rule",
+        "atrule",
       ],
       style: {
         color: "#728fcb",
diff --git a/src/themes/oceanicNext.js b/src/themes/oceanicNext.js
index 492969e..025fe72 100755
--- a/src/themes/oceanicNext.js
+++ b/src/themes/oceanicNext.js
@@ -115,7 +115,7 @@ var theme: PrismTheme = {
       },
     },
     {
-      types: ["at-rule", "class-name"],
+      types: ["atrule", "class-name"],
       style: {
         color: colors.className,
       },
diff --git a/tools/themeFromVsCode/src/scopeMapper.js b/tools/themeFromVsCode/src/scopeMapper.js
index 78a7b06..a64e0e5 100755
--- a/tools/themeFromVsCode/src/scopeMapper.js
+++ b/tools/themeFromVsCode/src/scopeMapper.js
@@ -36,8 +36,8 @@ const scopeMap = {
   "keyword.control": "keyword",
   "keyword.other": "keyword",
   "variable.parameter.url": "url",
-  "meta.at-rule": "at-rule",
-  "source.css.scss": "at-rule",
+  "meta.at-rule": "atrule",
+  "source.css.scss": "atrule",
   "markup.inserted": "inserted",
   "markup.deleted": "deleted",
   "markup.changed": "changed",