diff --git a/src/components/pages/AdminProfForm/AdminProfForm.tsx b/src/components/pages/AdminProfForm/AdminProfForm.tsx
index 6c4776dd..7f497767 100644
--- a/src/components/pages/AdminProfForm/AdminProfForm.tsx
+++ b/src/components/pages/AdminProfForm/AdminProfForm.tsx
@@ -149,7 +149,6 @@ function AdminProfForm({ professorId }: Props) {
       login(accessToken);
       router.push("/");
       router.refresh();
-
     } catch (err) {
       console.error(err);
     }
diff --git a/src/components/pages/achievement/AchievementForm.tsx b/src/components/pages/achievement/AchievementForm.tsx
index 7fcff6ab..362f9d34 100644
--- a/src/components/pages/achievement/AchievementForm.tsx
+++ b/src/components/pages/achievement/AchievementForm.tsx
@@ -107,9 +107,19 @@ function AchievementForm({ form, handleSubmit, isEdit, isAdmin }: Props) {
           <RowGroup>
             <BasicRow field="ISSN">
               <Group justify="space-between">
-                <InputBase w={100} component={IMaskInput} mask="0000" {...getInputProps("ISSN1")} />
+                <InputBase
+                  w={100}
+                  component={IMaskInput}
+                  mask={/^[0-9a-zA-Z]{1,4}$/}
+                  {...getInputProps("ISSN1")}
+                />
                 {" - "}
-                <InputBase w={100} component={IMaskInput} mask="0000" {...getInputProps("ISSN2")} />
+                <InputBase
+                  w={100}
+                  component={IMaskInput}
+                  mask={/^[0-9a-zA-Z]{1,4}$/}
+                  {...getInputProps("ISSN2")}
+                />
               </Group>
             </BasicRow>
           </RowGroup>