diff --git a/.sqlx/query-792037c2586baeca11fc16c3c7cfcdd1e0d75a2ca085749d0483f098443597ac.json b/.sqlx/query-063224c6636d76faf35fc7f83743419900ac8259d238c07772afc3f3f8c18a7d.json
similarity index 79%
rename from .sqlx/query-792037c2586baeca11fc16c3c7cfcdd1e0d75a2ca085749d0483f098443597ac.json
rename to .sqlx/query-063224c6636d76faf35fc7f83743419900ac8259d238c07772afc3f3f8c18a7d.json
index abdc9c3..483ca9a 100644
--- a/.sqlx/query-792037c2586baeca11fc16c3c7cfcdd1e0d75a2ca085749d0483f098443597ac.json
+++ b/.sqlx/query-063224c6636d76faf35fc7f83743419900ac8259d238c07772afc3f3f8c18a7d.json
@@ -1,6 +1,6 @@
 {
   "db_name": "SQLite",
-  "query": "\n            SELECT id, verification_time as \"verification_time: NaiveDateTime\"\n            FROM candidates\n            WHERE id = $1\n        ",
+  "query": "\n            SELECT id, verification_time as \"verification_time: NaiveDateTime\"\n            FROM candidates\n            WHERE id = $1 COLLATE NOCASE\n        ",
   "describe": {
     "columns": [
       {
@@ -22,5 +22,5 @@
       true
     ]
   },
-  "hash": "792037c2586baeca11fc16c3c7cfcdd1e0d75a2ca085749d0483f098443597ac"
+  "hash": "063224c6636d76faf35fc7f83743419900ac8259d238c07772afc3f3f8c18a7d"
 }
diff --git a/.sqlx/query-2ac323324a8ed9bc0296660bc56a96a58b1a6178a8c3e2f367c09a767b386693.json b/.sqlx/query-2ac323324a8ed9bc0296660bc56a96a58b1a6178a8c3e2f367c09a767b386693.json
new file mode 100644
index 0000000..1055dc1
--- /dev/null
+++ b/.sqlx/query-2ac323324a8ed9bc0296660bc56a96a58b1a6178a8c3e2f367c09a767b386693.json
@@ -0,0 +1,12 @@
+{
+  "db_name": "SQLite",
+  "query": "DELETE FROM candidates WHERE id = $1 COLLATE NOCASE",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Right": 1
+    },
+    "nullable": []
+  },
+  "hash": "2ac323324a8ed9bc0296660bc56a96a58b1a6178a8c3e2f367c09a767b386693"
+}
diff --git a/.sqlx/query-7cb2a9ac8a6605c2b8f83f0dcee78815bd6fc344c67adf98c6d76cbb72255d2e.json b/.sqlx/query-7cb2a9ac8a6605c2b8f83f0dcee78815bd6fc344c67adf98c6d76cbb72255d2e.json
deleted file mode 100644
index 5b7f549..0000000
--- a/.sqlx/query-7cb2a9ac8a6605c2b8f83f0dcee78815bd6fc344c67adf98c6d76cbb72255d2e.json
+++ /dev/null
@@ -1,12 +0,0 @@
-{
-  "db_name": "SQLite",
-  "query": "DELETE FROM candidates WHERE id = $1",
-  "describe": {
-    "columns": [],
-    "parameters": {
-      "Right": 1
-    },
-    "nullable": []
-  },
-  "hash": "7cb2a9ac8a6605c2b8f83f0dcee78815bd6fc344c67adf98c6d76cbb72255d2e"
-}
diff --git a/.sqlx/query-32dc384f62c4d22190e05c9c9144a0d101d9fc6e6de889e2e4bded8415ec0170.json b/.sqlx/query-8d15558bfe57d80116c5bbabc9c0eee2b21e92c062ae760decc2abd74f32871e.json
similarity index 56%
rename from .sqlx/query-32dc384f62c4d22190e05c9c9144a0d101d9fc6e6de889e2e4bded8415ec0170.json
rename to .sqlx/query-8d15558bfe57d80116c5bbabc9c0eee2b21e92c062ae760decc2abd74f32871e.json
index 79944c1..466075e 100644
--- a/.sqlx/query-32dc384f62c4d22190e05c9c9144a0d101d9fc6e6de889e2e4bded8415ec0170.json
+++ b/.sqlx/query-8d15558bfe57d80116c5bbabc9c0eee2b21e92c062ae760decc2abd74f32871e.json
@@ -1,6 +1,6 @@
 {
   "db_name": "SQLite",
-  "query": "\n            UPDATE candidates\n            SET verification_time = $2\n            WHERE id = $1\n        ",
+  "query": "\n            UPDATE candidates\n            SET verification_time = $2\n            WHERE id = $1 COLLATE NOCASE\n        ",
   "describe": {
     "columns": [],
     "parameters": {
@@ -8,5 +8,5 @@
     },
     "nullable": []
   },
-  "hash": "32dc384f62c4d22190e05c9c9144a0d101d9fc6e6de889e2e4bded8415ec0170"
+  "hash": "8d15558bfe57d80116c5bbabc9c0eee2b21e92c062ae760decc2abd74f32871e"
 }
diff --git a/migrations/20251129150553_compare_case_insensitive.down.sql b/migrations/20251129150553_compare_case_insensitive.down.sql
new file mode 100644
index 0000000..04b4d39
--- /dev/null
+++ b/migrations/20251129150553_compare_case_insensitive.down.sql
@@ -0,0 +1 @@
+DROP INDEX idx_candidates_id_nocase
diff --git a/migrations/20251129150553_compare_case_insensitive.up.sql b/migrations/20251129150553_compare_case_insensitive.up.sql
new file mode 100644
index 0000000..25c978f
--- /dev/null
+++ b/migrations/20251129150553_compare_case_insensitive.up.sql
@@ -0,0 +1 @@
+CREATE INDEX idx_candidates_id_nocase ON candidates(id COLLATE NOCASE);
diff --git a/src/database/candidate.rs b/src/database/candidate.rs
index 61cced4..a04cf12 100644
--- a/src/database/candidate.rs
+++ b/src/database/candidate.rs
@@ -26,7 +26,7 @@ pub async fn get(id: &str, executor: impl SqliteExecutor<'_>) -> Result<Option<C
         r#"
             SELECT id, verification_time as "verification_time: NaiveDateTime"
             FROM candidates
-            WHERE id = $1
+            WHERE id = $1 COLLATE NOCASE
         "#,
         id
     )
@@ -42,7 +42,7 @@ pub async fn verify(id: &str, executor: impl SqliteExecutor<'_>) -> Result<()> {
         r#"
             UPDATE candidates
             SET verification_time = $2
-            WHERE id = $1
+            WHERE id = $1 COLLATE NOCASE
         "#,
         id,
         now
@@ -55,7 +55,7 @@ pub async fn verify(id: &str, executor: impl SqliteExecutor<'_>) -> Result<()> {
 
 #[tracing::instrument(skip(executor))]
 pub async fn delete(id: &str, executor: impl SqliteExecutor<'_>) -> Result<()> {
-    sqlx::query!("DELETE FROM candidates WHERE id = $1", id)
+    sqlx::query!("DELETE FROM candidates WHERE id = $1 COLLATE NOCASE", id)
         .execute(executor)
         .await?;