diff --git a/app/soapbox/actions/instance.ts b/app/soapbox/actions/instance.ts
index 150e9cc86..1c826e3d2 100644
--- a/app/soapbox/actions/instance.ts
+++ b/app/soapbox/actions/instance.ts
@@ -59,6 +59,7 @@ export function fetchInstance() {
     return api(getState).get('/api/v1/instance').then(({ data: instance }: { data: Record<string, any> }) => {
       dispatch({ type: INSTANCE_FETCH_SUCCESS, instance });
       if (needsNodeinfo(instance)) {
+        // @ts-ignore: ???
         dispatch(fetchNodeinfo()); // Pleroma < 2.1 backwards compatibility
       }
     }).catch(error => {
@@ -73,7 +74,9 @@ export function loadInstance() {
   return (dispatch: AppDispatch, getState: () => RootState) => {
     const host = getHost(getState());
 
+    // @ts-ignore: ???
     return dispatch(rememberInstance(host)).finally(() => {
+      // @ts-ignore: ???
       return dispatch(fetchInstance());
     });
   };
diff --git a/app/soapbox/features/ui/components/who-to-follow-panel.tsx b/app/soapbox/features/ui/components/who-to-follow-panel.tsx
index 09b55999a..d55f04585 100644
--- a/app/soapbox/features/ui/components/who-to-follow-panel.tsx
+++ b/app/soapbox/features/ui/components/who-to-follow-panel.tsx
@@ -46,6 +46,7 @@ const WhoToFollowPanel = ({ limit }: IWhoToFollowPanel) => {
         {suggestionsToRender.map((suggestion: ImmutableMap<string, any>) => (
           <AccountContainer
             key={suggestion.get('account')}
+            // @ts-ignore: TS thinks `id` is passed to <Account>, but it isn't
             id={suggestion.get('account')}
             actionIcon={require('@tabler/icons/icons/x.svg')}
             actionTitle={intl.formatMessage(messages.dismissSuggestion)}
diff --git a/app/soapbox/reducers/accounts.ts b/app/soapbox/reducers/accounts.ts
index cea4603af..bb9458cf1 100644
--- a/app/soapbox/reducers/accounts.ts
+++ b/app/soapbox/reducers/accounts.ts
@@ -1,6 +1,7 @@
 import {
   Map as ImmutableMap,
   List as ImmutableList,
+  OrderedSet as ImmutableOrderedSet,
   fromJS,
 } from 'immutable';
 import { AnyAction } from 'redux';
@@ -82,8 +83,8 @@ const addTags = (
 ): State => {
   return state.withMutations(state => {
     accountIds.forEach(id => {
-      state.updateIn([id, 'pleroma', 'tags'], ImmutableList(), (v: ImmutableList<string>) =>
-        v.toOrderedSet().union(tags).toList(),
+      state.updateIn([id, 'pleroma', 'tags'], ImmutableList(), v =>
+        ImmutableOrderedSet(fromJS(v)).union(tags).toList(),
       );
     });
   });
@@ -96,8 +97,8 @@ const removeTags = (
 ): State => {
   return state.withMutations(state => {
     accountIds.forEach(id => {
-      state.updateIn([id, 'pleroma', 'tags'], ImmutableList(), (v: ImmutableList<string>) =>
-        v.toOrderedSet().subtract(tags).toList(),
+      state.updateIn([id, 'pleroma', 'tags'], ImmutableList(), v =>
+        ImmutableOrderedSet(fromJS(v)).subtract(tags).toList(),
       );
     });
   });
diff --git a/app/soapbox/reducers/index.ts b/app/soapbox/reducers/index.ts
index 19d9930c0..4e54ec19f 100644
--- a/app/soapbox/reducers/index.ts
+++ b/app/soapbox/reducers/index.ts
@@ -128,6 +128,7 @@ export const StateRecord = ImmutableRecord(
   }, {}),
 );
 
+// @ts-ignore: This type is fine but TS thinks it's wrong
 const appReducer = combineReducers(reducers, StateRecord);
 
 // Clear the state (mostly) when the user logs out
diff --git a/app/soapbox/reducers/statuses.ts b/app/soapbox/reducers/statuses.ts
index 404094b95..c115a9089 100644
--- a/app/soapbox/reducers/statuses.ts
+++ b/app/soapbox/reducers/statuses.ts
@@ -136,7 +136,9 @@ const deleteStatus = (state: State, id: string, references: Array<string>) => {
 
 const importPendingStatus = (state: State, { in_reply_to_id }: APIEntity) => {
   if (in_reply_to_id) {
-    return state.updateIn([in_reply_to_id, 'replies_count'], 0, (count: number) => count + 1);
+    return state.updateIn([in_reply_to_id, 'replies_count'], 0, count => {
+      return typeof count === 'number' ? count + 1 : 0;
+    });
   } else {
     return state;
   }
@@ -144,7 +146,9 @@ const importPendingStatus = (state: State, { in_reply_to_id }: APIEntity) => {
 
 const deletePendingStatus = (state: State, { in_reply_to_id }: APIEntity) => {
   if (in_reply_to_id) {
-    return state.updateIn([in_reply_to_id, 'replies_count'], 0, (count: number) => Math.max(0, count - 1));
+    return state.updateIn([in_reply_to_id, 'replies_count'], 0, count => {
+      return typeof count === 'number' ? Math.max(0, count - 1) : 0;
+    });
   } else {
     return state;
   }
diff --git a/tsconfig.json b/tsconfig.json
index b961c4bcb..8412a8997 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -5,7 +5,7 @@
     "alwaysStrict": true,
     "strictNullChecks": false,
     "strictBindCallApply": true,
-    "strictFunctionTypes": false,
+    "strictFunctionTypes": true,
     "strictPropertyInitialization": false,
     "noImplicitAny": true,
     "noImplicitThis": true,