diff --git a/dictation_client/src/features/user/userSlice.ts b/dictation_client/src/features/user/userSlice.ts
index 6d64137..52ffbc4 100644
--- a/dictation_client/src/features/user/userSlice.ts
+++ b/dictation_client/src/features/user/userSlice.ts
@@ -87,7 +87,7 @@ export const userSlice = createSlice({
       action: PayloadAction<{ authorId: string | undefined }>
     ) => {
       const { authorId } = action.payload;
-      state.apps.addUser.authorId = authorId;
+      state.apps.addUser.authorId = authorId?.toUpperCase();
     },
     changeAutoRenew: (state, action: PayloadAction<{ autoRenew: boolean }>) => {
       const { autoRenew } = action.payload;
@@ -144,7 +144,7 @@ export const userSlice = createSlice({
       state.apps.updateUser.name = user.name;
       state.apps.updateUser.email = user.email;
       state.apps.updateUser.role = user.role as RoleType;
-      state.apps.updateUser.authorId = user.authorId;
+      state.apps.updateUser.authorId = user.authorId?.toUpperCase();
       state.apps.updateUser.encryption = user.encryption;
       state.apps.updateUser.encryptionPassword = undefined;
       state.apps.updateUser.prompt = user.prompt;
@@ -156,7 +156,7 @@ export const userSlice = createSlice({
       state.apps.selectedUser.name = user.name;
       state.apps.selectedUser.email = user.email;
       state.apps.selectedUser.role = user.role as RoleType;
-      state.apps.selectedUser.authorId = user.authorId;
+      state.apps.selectedUser.authorId = user.authorId?.toUpperCase();
       state.apps.selectedUser.encryption = user.encryption;
       state.apps.selectedUser.encryptionPassword = undefined;
       state.apps.selectedUser.prompt = user.prompt;
@@ -175,7 +175,7 @@ export const userSlice = createSlice({
       action: PayloadAction<{ authorId: string }>
     ) => {
       const { authorId } = action.payload;
-      state.apps.updateUser.authorId = authorId;
+      state.apps.updateUser.authorId = authorId.toUpperCase();
     },
     changeUpdateEncryption: (
       state,
@@ -243,7 +243,8 @@ export const userSlice = createSlice({
       state.apps.licenseAllocateUser.id = selectedUser.id;
       state.apps.licenseAllocateUser.name = selectedUser.name;
       state.apps.licenseAllocateUser.email = selectedUser.email;
-      state.apps.licenseAllocateUser.authorId = selectedUser.authorId;
+      state.apps.licenseAllocateUser.authorId =
+        selectedUser.authorId.toUpperCase();
       state.apps.licenseAllocateUser.licenseStatus = selectedUser.licenseStatus;
       state.apps.licenseAllocateUser.expiration = selectedUser.expiration;
       state.apps.licenseAllocateUser.remaining = selectedUser.remaining;
diff --git a/dictation_client/src/pages/UserListPage/popup.tsx b/dictation_client/src/pages/UserListPage/popup.tsx
index 35c8f0f..50ed98f 100644
--- a/dictation_client/src/pages/UserListPage/popup.tsx
+++ b/dictation_client/src/pages/UserListPage/popup.tsx
@@ -200,7 +200,11 @@ export const UserAddPopup: React.FC<UserAddPopupProps> = (props) => {
                     className={styles.formInput}
                     value={addUser.authorId ?? undefined}
                     onChange={(e) => {
-                      dispatch(changeAuthorId({ authorId: e.target.value }));
+                      dispatch(
+                        changeAuthorId({
+                          authorId: e.target.value.toUpperCase(),
+                        })
+                      );
                     }}
                   />
                   {isPushCreateButton && hasErrorEmptyAuthorId && (
diff --git a/dictation_client/src/pages/UserListPage/updatePopup.tsx b/dictation_client/src/pages/UserListPage/updatePopup.tsx
index 00ce988..fa5944e 100644
--- a/dictation_client/src/pages/UserListPage/updatePopup.tsx
+++ b/dictation_client/src/pages/UserListPage/updatePopup.tsx
@@ -184,7 +184,9 @@ export const UserUpdatePopup: React.FC<UserUpdatePopupProps> = (props) => {
                     className={styles.formInput}
                     onChange={(e) => {
                       dispatch(
-                        changeUpdateAuthorId({ authorId: e.target.value })
+                        changeUpdateAuthorId({
+                          authorId: e.target.value.toUpperCase(),
+                        })
                       );
                     }}
                   />