diff --git a/src/main/resources/templates/category_create.html b/src/main/resources/templates/category_create.html
index 3a42e92..e91ecd6 100644
--- a/src/main/resources/templates/category_create.html
+++ b/src/main/resources/templates/category_create.html
@@ -25,7 +25,7 @@
 					<div class="mb-3">
 						<label class="form-label" for="categoryName">カテゴリ名</label>
 
-						<input class="form-control" type="text" id="categoryName" th:field="*{categoryName}">
+						<input class="form-control" type="text" id="categoryName" th:field="*{categoryName}" required>
 					</div>
 
 					<br>
@@ -33,7 +33,7 @@
 					<div class="mb-3">
 						<label class="form-label" for="transactionType">収入・支出</label>
 
-						<select class="form-select" id="transactionType" th:field="*{transactionType}">
+						<select class="form-select" id="transactionType" th:field="*{transactionType}" required>
 
 							<option value="">選択してください</option>
 							<option value="0">支出</option>
diff --git a/src/main/resources/templates/category_update.html b/src/main/resources/templates/category_update.html
index f69ad72..71497e2 100644
--- a/src/main/resources/templates/category_update.html
+++ b/src/main/resources/templates/category_update.html
@@ -25,7 +25,7 @@
 					<div class="mb-3">
 						<label class="form-label" for="categoryName">カテゴリ名</label>
 
-						<input class="form-control" type="text" id="categoryName" th:field="*{categoryName}">
+						<input class="form-control" type="text" id="categoryName" th:field="*{categoryName}" required>
 					</div>
 
 					<br>
@@ -33,7 +33,7 @@
 					<div class="mb-3">
 						<label class="form-label" for="transactionType">収入・支出</label>
 
-						<select class="form-select" id="transactionType" th:field="*{transactionType}">
+						<select class="form-select" id="transactionType" th:field="*{transactionType}" required>
 
 							<option value="">選択してください</option>
 							<option value="0">支出</option>