diff --git a/frontend/src/components/forms/FrameRateForm.tsx b/frontend/src/components/forms/FrameRateForm.tsx
index 7c57daf28..e58f59c4f 100644
--- a/frontend/src/components/forms/FrameRateForm.tsx
+++ b/frontend/src/components/forms/FrameRateForm.tsx
@@ -28,11 +28,11 @@ const FrameRateForm: FunctionComponent<Props> = ({ selections, onSubmit }) => {
     },
     validate: {
       from: FormUtils.validation(
-        (value) => value > 0,
+        (value: number) => value > 0,
         "The From value must be larger than 0",
       ),
       to: FormUtils.validation(
-        (value) => value > 0,
+        (value: number) => value > 0,
         "The To value must be larger than 0",
       ),
     },
diff --git a/frontend/src/components/forms/MovieUploadForm.tsx b/frontend/src/components/forms/MovieUploadForm.tsx
index f7f8f47c5..893a33ea5 100644
--- a/frontend/src/components/forms/MovieUploadForm.tsx
+++ b/frontend/src/components/forms/MovieUploadForm.tsx
@@ -114,10 +114,10 @@ const MovieUploadForm: FunctionComponent<Props> = ({
         })),
     },
     validate: {
-      files: FormUtils.validation((values) => {
+      files: FormUtils.validation((values: SubtitleFile[]) => {
         return (
           values.find(
-            (v) =>
+            (v: SubtitleFile) =>
               v.language === null ||
               v.validateResult === undefined ||
               v.validateResult.state === "error",
diff --git a/frontend/src/components/forms/ProfileEditForm.tsx b/frontend/src/components/forms/ProfileEditForm.tsx
index 267951fcb..6f7702d81 100644
--- a/frontend/src/components/forms/ProfileEditForm.tsx
+++ b/frontend/src/components/forms/ProfileEditForm.tsx
@@ -70,10 +70,10 @@ const ProfileEditForm: FunctionComponent<Props> = ({
     initialValues: profile,
     validate: {
       name: FormUtils.validation(
-        (value) => value.length > 0,
+        (value: string) => value.length > 0,
         "Must have a name",
       ),
-      tag: FormUtils.validation((value) => {
+      tag: FormUtils.validation((value: string | undefined) => {
         if (!value) {
           return true;
         }
@@ -81,7 +81,7 @@ const ProfileEditForm: FunctionComponent<Props> = ({
         return /^[a-z_0-9-]+$/.test(value);
       }, "Only lowercase alphanumeric characters, underscores (_) and hyphens (-) are allowed"),
       items: FormUtils.validation(
-        (value) => value.length > 0,
+        (value: Language.ProfileItem[]) => value.length > 0,
         "Must contain at least 1 language",
       ),
     },
diff --git a/frontend/src/components/forms/SeriesUploadForm.tsx b/frontend/src/components/forms/SeriesUploadForm.tsx
index 9ae6308c9..e09f8e677 100644
--- a/frontend/src/components/forms/SeriesUploadForm.tsx
+++ b/frontend/src/components/forms/SeriesUploadForm.tsx
@@ -128,9 +128,9 @@ const SeriesUploadForm: FunctionComponent<Props> = ({
     },
     validate: {
       files: FormUtils.validation(
-        (values) =>
+        (values: SubtitleFile[]) =>
           values.find(
-            (v) =>
+            (v: SubtitleFile) =>
               v.language === null ||
               v.episode === null ||
               v.validateResult === undefined ||
diff --git a/frontend/src/components/forms/TimeOffsetForm.tsx b/frontend/src/components/forms/TimeOffsetForm.tsx
index 1a7739dd9..092b99861 100644
--- a/frontend/src/components/forms/TimeOffsetForm.tsx
+++ b/frontend/src/components/forms/TimeOffsetForm.tsx
@@ -32,11 +32,20 @@ const TimeOffsetForm: FunctionComponent<Props> = ({ selections, onSubmit }) => {
       ms: 0,
     },
     validate: {
-      hour: FormUtils.validation((v) => v >= 0, "Hour must be larger than 0"),
-      min: FormUtils.validation((v) => v >= 0, "Minute must be larger than 0"),
-      sec: FormUtils.validation((v) => v >= 0, "Second must be larger than 0"),
+      hour: FormUtils.validation(
+        (v: number) => v >= 0,
+        "Hour must be larger than 0",
+      ),
+      min: FormUtils.validation(
+        (v: number) => v >= 0,
+        "Minute must be larger than 0",
+      ),
+      sec: FormUtils.validation(
+        (v: number) => v >= 0,
+        "Second must be larger than 0",
+      ),
       ms: FormUtils.validation(
-        (v) => v >= 0,
+        (v: number) => v >= 0,
         "Millisecond must be larger than 0",
       ),
     },
diff --git a/frontend/src/pages/Settings/Notifications/components.tsx b/frontend/src/pages/Settings/Notifications/components.tsx
index 8fa17abb2..86151ae2c 100644
--- a/frontend/src/pages/Settings/Notifications/components.tsx
+++ b/frontend/src/pages/Settings/Notifications/components.tsx
@@ -57,7 +57,7 @@ const NotificationForm: FunctionComponent<Props> = ({
         "Please select a notification provider",
       ),
       url: FormUtils.validation(
-        (value) => value.trim().length !== 0,
+        (value: string) => value.trim().length !== 0,
         "URL must not be empty",
       ),
     },