diff --git a/README.md b/README.md
index a5de8b0..9de33c2 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ An implementation of [docker-names](https://github.com/moby/moby/blob/master/pkg
    - animal breeding
    - rumen science
    - among others...
-2. Changed the delimiter back to an underscore
+2. Changed the delimiter to an underscore when adding extra data (date or number)
 3. Added an identifier that starts with a date (useful where identifiers have to be sorted chronologically).
 
 ## Usage
diff --git a/src/index.ts b/src/index.ts
index c6114bf..2e31ab8 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -964,7 +964,7 @@ export const right = [
 export function generateName(): string {
   const leftElement = left[Math.floor(Math.random() * left.length)];
   const rightElement = right[Math.floor(Math.random() * right.length)];
-  return `${leftElement}_${rightElement}`
+  return `${leftElement}-${rightElement}`
 }
 
 /**