diff --git a/image/spec/v1.1.md b/image/spec/v1.1.md
index 6279da54af..ce761f112a 100644
--- a/image/spec/v1.1.md
+++ b/image/spec/v1.1.md
@@ -88,7 +88,7 @@ This specification uses the following terms:
         A tag serves to map a descriptive, user-given name to any single image
         ID. Tag values are limited to the set of characters
         <code>[a-zA-Z0-9_.-]</code>, except they may not start with a <code>.</code>
-        or <code>-</code> character. Tags are limited to 127 characters.
+        or <code>-</code> character. Tags are limited to 128 characters.
     </dd>
     <dt>
         Repository
diff --git a/image/spec/v1.2.md b/image/spec/v1.2.md
index 483ce1e4cb..789680c7a7 100644
--- a/image/spec/v1.2.md
+++ b/image/spec/v1.2.md
@@ -88,7 +88,7 @@ This specification uses the following terms:
         A tag serves to map a descriptive, user-given name to any single image
         ID. Tag values are limited to the set of characters
         <code>[a-zA-Z0-9_.-]</code>, except they may not start with a <code>.</code>
-        or <code>-</code> character. Tags are limited to 127 characters.
+        or <code>-</code> character. Tags are limited to 128 characters.
     </dd>
     <dt>
         Repository