diff --git a/CHANGELOG.md b/CHANGELOG.md
index c4ac735..22fdd33 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ## [Unreleased]
 
+### Fixed
+
+- Check if max-validation-depth is an integer 1-999
+
 ## [5.0.0] 2024-06-17
 
 ### Added
diff --git a/README.md b/README.md
index 9705f4c..29a7341 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ Enable SHACL Advanced Features. Default value: *false*.
 
 ### Maximum evaluation depth
 
-The maximum number of SHACL shapes "deep" that the validator can go before reaching an "endpoint" constraint. Default value: 15
+The maximum number of SHACL shapes "deep" that the validator can go before reaching an "endpoint" constraint (1-999). Default value: 15
 
 
 ## Parameter Input
diff --git a/cmem_plugin_pyshacl/plugin_pyshacl.py b/cmem_plugin_pyshacl/plugin_pyshacl.py
index afb8578..4ae25cb 100644
--- a/cmem_plugin_pyshacl/plugin_pyshacl.py
+++ b/cmem_plugin_pyshacl/plugin_pyshacl.py
@@ -617,7 +617,9 @@ def check_parameters(  # noqa: C901 PLR0912
         if self.inference not in ("none", "rdfs", "owlrl", "both"):
             raise ValueError("Invalid value for inference parameter")
 
-        if not isinstance(self.max_validation_depth, int) and self.max_validation_depth < 1:
+        if not isinstance(
+            self.max_validation_depth, int
+        ) and self.max_validation_depth not in range(1, 1000):
             raise ValueError("Invalid value for maximum evaluation depth")
 
         self.log.info("Parameters OK:")