diff --git a/Dockerfile b/Dockerfile
index e60bd06..9dedcc0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.18
+FROM alpine:3.23
 
 RUN apk add --no-cache jq sqlite coreutils
 
diff --git a/tests/user-output/user-output_test.sql b/tests/user-output/user-output_test.sql
index 481e9de..f200a9d 100644
--- a/tests/user-output/user-output_test.sql
+++ b/tests/user-output/user-output_test.sql
@@ -12,7 +12,7 @@ DROP TABLE IF EXISTS main.tests;
 CREATE TABLE IF NOT EXISTS main.tests (
     uuid TEXT PRIMARY KEY,
 	name TEXT NOT NULL,
-    status TEXT DEFAULT "fail",
+    status TEXT DEFAULT 'fail',
     message TEXT,
     output TEXT,
     test_code TEXT,
@@ -23,22 +23,22 @@ CREATE TABLE IF NOT EXISTS main.tests (
 
 INSERT INTO tests (name, uuid, year, result)
     VALUES
-        ("not_divisible_by_4", "6466b30d-519c-438e-935d-388224ab5223", 2015, 0),
-        ("divisible_by_2_not_divisible_by_4", "ac227e82-ee82-4a09-9eb6-4f84331ffdb0", 1970, 0),
-        ("divisible_by_4_not_divisible_by_100", "4fe9b84c-8e65-489e-970b-856d60b8b78e", 1996, 1),
-        ("divisible_by_100_not_divisible_by_400", "78a7848f-9667-4192-ae53-87b30c9a02dd", 2100, 0),
-        ("divisible_by_400", "42ee56ad-d3e6-48f1-8e3f-c84078d916fc", 2000, 1),
-        ("divisible_by_200_not_divisible_by_400", "c30331f6-f9f6-4881-ad38-8ca8c12520c1", 1800, 0);
+        ('not_divisible_by_4', '6466b30d-519c-438e-935d-388224ab5223', 2015, 0),
+        ('divisible_by_2_not_divisible_by_4', 'ac227e82-ee82-4a09-9eb6-4f84331ffdb0', 1970, 0),
+        ('divisible_by_4_not_divisible_by_100', '4fe9b84c-8e65-489e-970b-856d60b8b78e', 1996, 1),
+        ('divisible_by_100_not_divisible_by_400', '78a7848f-9667-4192-ae53-87b30c9a02dd', 2100, 0),
+        ('divisible_by_400', '42ee56ad-d3e6-48f1-8e3f-c84078d916fc', 2000, 1),
+        ('divisible_by_200_not_divisible_by_400', 'c30331f6-f9f6-4881-ad38-8ca8c12520c1', 1800, 0);
 
 UPDATE tests
-SET status = "pass"
+SET status = 'pass'
 FROM (SELECT year, is_leap FROM leap) AS actual
 WHERE (actual.year, actual.is_leap) = (tests.year, tests.result);
 
 UPDATE tests
-SET message = "Result for " || actual.year || " is: " || actual.is_leap || ", but should be: " || tests.result
+SET message = 'Result for ' || actual.year || ' is: ' || actual.is_leap || ', but should be: ' || tests.result
 FROM (SELECT year, is_leap FROM leap) AS actual
-WHERE actual.year = tests.year AND tests.status = "fail";
+WHERE actual.year = tests.year AND tests.status = 'fail';
 
 .mode json
 .once './output.json'
@@ -48,4 +48,4 @@ FROM tests;
 
 .mode table
 SELECT name, status, message
-FROM tests;
\ No newline at end of file
+FROM tests;