Index: lams_central/src/java/org/lamsfoundation/lams/web/controller/EditorEmbedProxyController.java
===================================================================
diff -u -r162784e5aec3a88d7e9454a05502976b920d53a4 -r69e303d61072faaf7f7d9c3551e22dd05c48d601
--- lams_central/src/java/org/lamsfoundation/lams/web/controller/EditorEmbedProxyController.java	(.../EditorEmbedProxyController.java)	(revision 162784e5aec3a88d7e9454a05502976b920d53a4)
+++ lams_central/src/java/org/lamsfoundation/lams/web/controller/EditorEmbedProxyController.java	(.../EditorEmbedProxyController.java)	(revision 69e303d61072faaf7f7d9c3551e22dd05c48d601)
@@ -19,6 +19,7 @@
 import org.lamsfoundation.lams.util.FileUtil;
 import org.lamsfoundation.lams.util.WebUtil;
 import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -130,7 +131,8 @@
 			this.customEmbedJsonTemplate.get("html").asText().replace("[URL]", embeddedUrl));
 		StringBuilder responseString = new StringBuilder(callback).append(" && ").append(callback).append("(")
 			.append(responseJSON.toString()).append(");");
-		return ResponseEntity.ok(responseString.toString());
+		return ResponseEntity.ok().contentType(MediaType.parseMediaType("application/javascript"))
+			.body(responseString.toString());
 	    }
 	}