diff --git a/packages/@ourworldindata/grapher/src/core/Grapher.tsx b/packages/@ourworldindata/grapher/src/core/Grapher.tsx
index 7166459c994..44add4b5e6b 100644
--- a/packages/@ourworldindata/grapher/src/core/Grapher.tsx
+++ b/packages/@ourworldindata/grapher/src/core/Grapher.tsx
@@ -1481,7 +1481,7 @@ export class Grapher
 
         if (uniqueAttributions.length > 3) return "Multiple sources"
 
-        return uniqueAttributions.join(", ")
+        return uniqueAttributions.join("; ")
     }
 
     @computed private get axisDimensions(): ChartDimension[] {
diff --git a/packages/@ourworldindata/utils/src/Util.ts b/packages/@ourworldindata/utils/src/Util.ts
index 8fc385beacc..a2e4a382346 100644
--- a/packages/@ourworldindata/utils/src/Util.ts
+++ b/packages/@ourworldindata/utils/src/Util.ts
@@ -1754,7 +1754,7 @@ export function getAttributionFromVariable(
         variable.origins
     )
     const sourceName = variable.source?.name
-    return uniq(compact([sourceName, ...originAttributionFragments])).join(", ")
+    return uniq(compact([sourceName, ...originAttributionFragments])).join("; ")
 }
 
 interface ETLPathComponents {