diff --git a/.eslintrc.js b/.eslintrc.js
index e6b76939..bc9fb706 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -184,5 +184,5 @@ module.exports = {
             }
         }
     ],
-    "ignorePatterns": [".eslintrc.js", "widget/**/*"],
+    "ignorePatterns": [".eslintrc.js", "widget/**/*", "src/generate-signing-key.js"],
 };
diff --git a/src/Main.ts b/src/Main.ts
index ffec9abf..d8871c82 100644
--- a/src/Main.ts
+++ b/src/Main.ts
@@ -1168,7 +1168,10 @@ export class Main {
                 throw Error(`Failed to start Media Proxy: ${err}`);
             });
         } else {
-            log.warn("Media Proxy not configured: media bridging to Slack won't work on servers requiring authenticated media (default since Synapse v1.120.0)");
+            log.warn(
+                "Media Proxy not configured: media bridging to Slack won't work on servers requiring authenticated media " +
+                "(default since Synapse v1.120.0)"
+            );
         }
 
 
diff --git a/src/substitutions.ts b/src/substitutions.ts
index f6df5f99..0f7ff836 100644
--- a/src/substitutions.ts
+++ b/src/substitutions.ts
@@ -175,7 +175,7 @@ class Substitutions {
         }
         let url: string;
         if (main.mediaProxy) {
-            url = await main.mediaProxy.generateMediaUrl(event.content.url).then(url => url.toString());
+            url = await main.mediaProxy.generateMediaUrl(event.content.url).then(u => u.toString());
         } else {
             url = main.getUrlForMxc(event.content.url, main.encryptRoom);
         }