diff --git a/integrations/slack/integration.definition.ts b/integrations/slack/integration.definition.ts
index cf2cc738d7e..df27854c88b 100644
--- a/integrations/slack/integration.definition.ts
+++ b/integrations/slack/integration.definition.ts
@@ -17,7 +17,7 @@ export default new IntegrationDefinition({
   name: 'slack',
   title: 'Slack',
   description: 'Automate interactions with your team.',
-  version: '2.5.2',
+  version: '2.5.3',
   icon: 'icon.svg',
   readme: 'hub.md',
   configuration,
diff --git a/integrations/slack/src/setup.ts b/integrations/slack/src/setup.ts
index f2b3dea0325..9b0fb3d3960 100644
--- a/integrations/slack/src/setup.ts
+++ b/integrations/slack/src/setup.ts
@@ -83,7 +83,7 @@ export const register: bp.IntegrationProps['register'] = async ({ client, ctx, l
     const missingScopes = REQUIRED_SLACK_SCOPES.filter((scope) => !grantedScopes.includes(scope))
 
     throw new sdk.RuntimeError(
-      `The Slack access token is missing required scopes. Please re-authorize the app.\n\n` +
+      'The Slack access token is missing required scopes. Please re-authorize the app.\n\n' +
         `Missing scopes: ${missingScopes.join(', ')}.\n` +
         `Granted scopes: ${grantedScopes.join(', ')}.`
     )
diff --git a/integrations/slack/src/slack-api/slack-scopes.ts b/integrations/slack/src/slack-api/slack-scopes.ts
index fbcb763a3be..d95088f6cca 100644
--- a/integrations/slack/src/slack-api/slack-scopes.ts
+++ b/integrations/slack/src/slack-api/slack-scopes.ts
@@ -10,8 +10,15 @@ export const requiresAllScopesDecorator =
   (slackClient: SlackClient, methodName: string, descriptor: PropertyDescriptor): void => {
     const _originalMethod: (...args: unknown[]) => Promise<unknown> = descriptor.value
     descriptor.value = function (...args: unknown[]) {
+      // This function replaces the property descriptor (the class method) with
+      // a new function. Within the context of this function, `this` refers to
+      // the instance of the class (SlackClient) where the method is defined.
+
+      // We use .apply and .call to ensure that instance methods are attached to
+      // the actual instance of SlackClient.
+
       if (!slackClient.hasAllScopes.apply(this, [requiredScopes])) {
-        const grantedScopes = slackClient.getGrantedScopes()
+        const grantedScopes = slackClient.getGrantedScopes.call(this)
         const missingScopes = requiredScopes.filter((scope) => !grantedScopes.includes(scope))
 
         throw new sdk.RuntimeError(
@@ -19,7 +26,7 @@ export const requiresAllScopesDecorator =
             'Please re-authorize the app. \n\n' +
             `Scopes required for this operation: ${requiredScopes.join(', ')}. \n` +
             `Missing scopes: ${missingScopes.join(', ')}. \n` +
-            `Scopes granted to the app: ${slackClient.getGrantedScopes().join(', ')}.`
+            `Scopes granted to the app: ${grantedScopes.join(', ')}.`
         )
       }
       return _originalMethod.apply(this, args)