diff --git a/packages/extension-strike/src/strike.ts b/packages/extension-strike/src/strike.ts
index 48baac08c..0f8134eb0 100644
--- a/packages/extension-strike/src/strike.ts
+++ b/packages/extension-strike/src/strike.ts
@@ -53,7 +53,9 @@ export const Strike = Mark.create<StrikeOptions>({
         tag: 'strike',
       },
       {
-        style: 'text-decoration=line-through',
+        style: 'text-decoration',
+        consuming: false,
+        getAttrs: style => ((style as string).includes('line-through') ? {} : false),
       },
     ]
   },
diff --git a/packages/extension-underline/src/underline.ts b/packages/extension-underline/src/underline.ts
index 53630ab48..f9e9ee36c 100644
--- a/packages/extension-underline/src/underline.ts
+++ b/packages/extension-underline/src/underline.ts
@@ -38,7 +38,9 @@ export const Underline = Mark.create<UnderlineOptions>({
         tag: 'u',
       },
       {
-        style: 'text-decoration=underline',
+        style: 'text-decoration',
+        consuming: false,
+        getAttrs: style => ((style as string).includes('underline') ? {} : false),
       },
     ]
   },