diff --git a/types/lodash/common/collection.d.ts b/types/lodash/common/collection.d.ts
index d8ddc97197..024116adc8 100644
--- a/types/lodash/common/collection.d.ts
+++ b/types/lodash/common/collection.d.ts
@@ -215,7 +215,7 @@ declare module "../index" {
          * @return Returns the new filtered array.
          */
         filter(
-            collection: string | null | undefined,
+            collection: string | string[] | null | undefined,
             predicate?: StringIterator<boolean>
         ): string[];
 
@@ -257,7 +257,7 @@ declare module "../index" {
          * @see _.filter
          */
         filter(
-            this: LoDashImplicitWrapper<string | null | undefined>,
+            this: LoDashImplicitWrapper<string | string[] | null | undefined>,
             predicate?: StringIterator<boolean>
         ): LoDashImplicitWrapper<string[]>;
 
@@ -299,7 +299,7 @@ declare module "../index" {
          * @see _.filter
          */
         filter(
-            this: LoDashExplicitWrapper<string | null | undefined>,
+            this: LoDashExplicitWrapper<string | string[] | null | undefined>,
             predicate?: StringIterator<boolean>
         ): LoDashExplicitWrapper<string[]>;
 
diff --git a/types/lodash/fp.d.ts b/types/lodash/fp.d.ts
index 9b6cf52ccb..a31b8b459d 100644
--- a/types/lodash/fp.d.ts
+++ b/types/lodash/fp.d.ts
@@ -918,8 +918,8 @@ declare namespace _ {
     type LodashFill2x14<T, U> = (start: number) => lodash.List<T | U>;
     interface LodashFilter {
         (predicate: (value: string) => boolean): LodashFilter1x1;
-        (predicate: lodash.__, collection: string | null | undefined): LodashFilter1x2;
-        (predicate: (value: string) => boolean, collection: string | null | undefined): string[];
+        (predicate: lodash.__, collection: string | string[] | null | undefined): LodashFilter1x2;
+        (predicate: (value: string) => boolean, collection: string | string[] | null | undefined): string[];
         <T, S extends T>(predicate: lodash.ValueIteratorTypeGuard<T, S>): LodashFilter2x1<T, S>;
         <T>(predicate: lodash.__, collection: lodash.List<T> | null | undefined): LodashFilter2x2<T>;
         <T, S extends T>(predicate: lodash.ValueIteratorTypeGuard<T, S>, collection: lodash.List<T> | null | undefined): S[];
@@ -930,7 +930,7 @@ declare namespace _ {
         <T extends object, S extends T[keyof T]>(predicate: lodash.ValueIteratorTypeGuard<T[keyof T], S>, collection: T | null | undefined): S[];
         <T extends object>(predicate: lodash.ValueIterateeCustom<T[keyof T], boolean>, collection: T | null | undefined): Array<T[keyof T]>;
     }
-    type LodashFilter1x1 = (collection: string | null | undefined) => string[];
+    type LodashFilter1x1 = (collection: string | string[] | null | undefined) => string[];
     type LodashFilter1x2 = (predicate: (value: string) => boolean) => string[];
     type LodashFilter2x1<T, S> = (collection: lodash.List<T> | null | undefined) => S[];
     interface LodashFilter2x2<T> {
diff --git a/types/lodash/lodash-tests.ts b/types/lodash/lodash-tests.ts
index 9d2547dcf4..1aa4bc3eb2 100644
--- a/types/lodash/lodash-tests.ts
+++ b/types/lodash/lodash-tests.ts
@@ -1766,6 +1766,7 @@ _.chain([1, 2, 3, 4]).unshift(5, 6); // $ExpectType LoDashExplicitWrapper<number
     fp.filter("", dictionary); // $ExpectType AbcObject[]
     fp.filter({ a: 42 }, dictionary); // $ExpectType AbcObject[]
     fp.filter(["a", 42], dictionary); // $ExpectType AbcObject[]
+    fp.filter(Boolean)(["a", "b"]); // $ExpectType string[]
 
     // Test filtering with type guard
     const a2: Array<string | number> | null | undefined = anything;
diff --git a/types/lowdb/_lodash.d.ts b/types/lowdb/_lodash.d.ts
index 7267aab0d9..c332a229c6 100644
--- a/types/lowdb/_lodash.d.ts
+++ b/types/lowdb/_lodash.d.ts
@@ -459,7 +459,7 @@ declare module "./index" {
             predicate?: _.ObjectIterateeCustom<T, boolean>
         ): LoDashExplicitSyncWrapper<boolean>;
         filter(
-            this: LoDashExplicitSyncWrapper<string | null | undefined>,
+            this: LoDashExplicitSyncWrapper<string | string[] | null | undefined>,
             predicate?: _.StringIterator<boolean>
         ): LoDashExplicitSyncWrapper<string[]>;
         filter<T, S extends T>(
@@ -2055,7 +2055,7 @@ declare module "./index" {
             predicate?: _.ObjectIterateeCustom<T, boolean>
         ): LoDashExplicitAsyncWrapper<boolean>;
         filter(
-            this: LoDashExplicitAsyncWrapper<string | null | undefined>,
+            this: LoDashExplicitAsyncWrapper<string | string[] | null | undefined>,
             predicate?: _.StringIterator<boolean>
         ): LoDashExplicitAsyncWrapper<string[]>;
         filter<T, S extends T>(