diff --git a/packages/regex/src/__tests__/index.ts b/packages/regex/src/__tests__/index.ts
index 8c0be06e8..e3b70f94c 100644
--- a/packages/regex/src/__tests__/index.ts
+++ b/packages/regex/src/__tests__/index.ts
@@ -48,7 +48,7 @@ const subDomain = 'sub.another-example.com'
 const dashStartDomain = '-sub.another-example.com'
 const uppercaseDomain = 'SUB.another-example.com'
 const longTldDomain = 'sub.another-example.verylongtld'
-const cronTest = '0/15*-'
+const cronTest = '0 0 0 * * 0 1-4'
 const digitsTest = '0123456789'
 const emailTest = 'test@scaleway.com'
 const fourDigitsTest = '2345'
diff --git a/packages/regex/src/index.ts b/packages/regex/src/index.ts
index 026301eaf..53694c10d 100644
--- a/packages/regex/src/index.ts
+++ b/packages/regex/src/index.ts
@@ -22,7 +22,7 @@ export const basicDomain = /^[a-z0-9-]+(\.[a-z0-9-]{1,63})+$/
 export const uppercaseBasicDomain =
   /^(?![-])+[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]{1,63})+$/
 
-export const cron = /^[0-9,/*-]+$/
+export const cron = /^((((\d+,)+\d+|(\d+(\/|-)\d+)|\d+|\*) ?){5,7})$/
 export const digits = /^[0-9]*$/
 export const macAddress =
   /^([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])$/