diff --git a/CHANGELOG.md b/CHANGELOG.md
index e481e71..675718e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](https://semver.org/)
 
+## [Unreleased] 2024-06-28
+
+### Fixed
+
+- valid range of "Maximum RAM Percentage" parameter in Validate plugin (1-100)
 
 ## [1.0.0alpha3] 2024-06-28
 
diff --git a/cmem_plugin_reason/plugin_validate.py b/cmem_plugin_reason/plugin_validate.py
index f2c8969..8a5a487 100644
--- a/cmem_plugin_reason/plugin_validate.py
+++ b/cmem_plugin_reason/plugin_validate.py
@@ -110,7 +110,7 @@ def __init__(  # noqa: PLR0913
                 validate_filename(md_filename)
             except:  # noqa: E722
                 errors += "Invalid filename for parameter Output filename. "
-        if max_ram_percentage not in range(1, 100):
+        if max_ram_percentage not in range(1, 101):
             errors += "Invalid value for parameter Maximum RAM Percentage. "
         if errors:
             raise ValueError(errors[:-1])