diff --git a/mimirtool/common.go b/mimirtool/common.go
index 56ada0a..8e88827 100644
--- a/mimirtool/common.go
+++ b/mimirtool/common.go
@@ -1,13 +1,17 @@
 package mimirtool
 
 import (
-	"crypto/sha256"
-	"encoding/hex"
+	"math/rand"
 )
 
-func hash(s string) string {
-	sha := sha256.Sum256([]byte(s))
-	return hex.EncodeToString(sha[:])
+const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+
+func randStringBytes(n int) string {
+	b := make([]byte, n)
+	for i := range b {
+		b[i] = letterBytes[rand.Intn(len(letterBytes))]
+	}
+	return string(b)
 }
 
 func stringValueMap(src map[string]interface{}) map[string]string {
diff --git a/mimirtool/resource_ruler_namespace.go b/mimirtool/resource_ruler_namespace.go
index ada7db0..027ffb1 100644
--- a/mimirtool/resource_ruler_namespace.go
+++ b/mimirtool/resource_ruler_namespace.go
@@ -112,7 +112,7 @@ func rulerNamespaceCreate(ctx context.Context, d *schema.ResourceData, meta any)
 		}
 	}
 
-	d.SetId(hash(namespace))
+	d.SetId(randStringBytes(64))
 	return rulerNamespaceRead(ctx, d, meta)
 }