diff --git a/src/main/java/com/googlesource/gerrit/plugins/uploadvalidator/PluginConfigValidator.java b/src/main/java/com/googlesource/gerrit/plugins/uploadvalidator/PluginConfigValidator.java
index d3d6404..430e92b 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/uploadvalidator/PluginConfigValidator.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/uploadvalidator/PluginConfigValidator.java
@@ -17,6 +17,7 @@
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.collect.ImmutableList;
 import com.google.common.flogger.FluentLogger;
+import com.google.common.primitives.Ints;
 import com.google.gerrit.entities.RefNames;
 import com.google.gerrit.extensions.annotations.PluginName;
 import com.google.gerrit.extensions.registration.DynamicSet;
@@ -134,7 +135,8 @@
         validateRegex(fileName, cfg, ChangeEmailValidator.KEY_ALLOWED_AUTHOR_EMAIL_PATTERN));
     validationMessages.addAll(
         validateRegex(fileName, cfg, ChangeEmailValidator.KEY_ALLOWED_COMMITTER_EMAIL_PATTERN));
-    // This is where we can add the validators for the other modules in the plugin.
+    validationMessages.addAll(
+        validateInteger(fileName, cfg, MaxPathLengthValidator.KEY_MAX_PATH_LENGTH));
     return validationMessages.build();
   }
 
@@ -166,4 +168,28 @@
     }
     return validationMessages.build();
   }
+
+  /**
+   * Validates an integer-only field
+   *
+   * @param fileName the name of the config file
+   * @param cfg the project.config to validate
+   * @return list of messages with validation issues, empty list if there are no issues
+   */
+  @VisibleForTesting
+  public ImmutableList<CommitValidationMessage> validateInteger(
+      String fileName, Config cfg, String validatorKey) {
+
+    String value = cfg.getString("plugin", pluginName, validatorKey);
+
+    if (Ints.tryParse(value) == null) {
+      return ImmutableList.of(
+          new CommitValidationMessage(
+              String.format(
+                  "The value '%s' configured in %s (parameter %s.%s) is invalid.",
+                  value, fileName, pluginName, validatorKey),
+              ValidationMessage.Type.ERROR));
+    }
+    return ImmutableList.of();
+  }
 }
diff --git a/src/test/java/com/googlesource/gerrit/plugins/uploadvalidator/PluginConfigValidatorTest.java b/src/test/java/com/googlesource/gerrit/plugins/uploadvalidator/PluginConfigValidatorTest.java
index 864c1b4..685abb8 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/uploadvalidator/PluginConfigValidatorTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/uploadvalidator/PluginConfigValidatorTest.java
@@ -17,6 +17,7 @@
 import static com.google.common.truth.Truth.assertThat;
 import static com.googlesource.gerrit.plugins.uploadvalidator.ChangeEmailValidator.KEY_ALLOWED_AUTHOR_EMAIL_PATTERN;
 import static com.googlesource.gerrit.plugins.uploadvalidator.ChangeEmailValidator.KEY_ALLOWED_COMMITTER_EMAIL_PATTERN;
+import static com.googlesource.gerrit.plugins.uploadvalidator.MaxPathLengthValidator.KEY_MAX_PATH_LENGTH;
 import static com.google.gerrit.server.project.ProjectConfig.PROJECT_CONFIG;
 
 import com.google.common.collect.ImmutableList;
@@ -29,6 +30,8 @@
   private static final String PLUGIN_NAME = "uploadvalidator";
   private static final String ILLEGAL_REGEX = "*";
   private static final String LEGAL_REGEX = ".*";
+  private static final String LEGAL_PATH_LENGTH = "100";
+  private static final String ILLEGAL_PATH_LENGTH = "10xi";
 
   private PluginConfigValidator configValidator;
   private Config cfg;
@@ -70,4 +73,21 @@
         configValidator.validateRegex(PROJECT_CONFIG, cfg, KEY_ALLOWED_COMMITTER_EMAIL_PATTERN);
     assertThat(messages).isNotEmpty();
   }
-}
+  
+  @Test
+  public void hasLegalMaxPathLength_noMessages() throws Exception {
+    cfg.setString("plugin", PLUGIN_NAME, KEY_MAX_PATH_LENGTH, LEGAL_PATH_LENGTH);
+    ImmutableList<CommitValidationMessage> messages =
+        configValidator.validateInteger(PROJECT_CONFIG, cfg, KEY_MAX_PATH_LENGTH);
+    assertThat(messages).isEmpty();
+  }
+
+  @Test
+  public void hasIllegalMaxPathLength_messages() throws Exception {
+    cfg.setString("plugin", PLUGIN_NAME, KEY_MAX_PATH_LENGTH, ILLEGAL_PATH_LENGTH);
+
+    ImmutableList<CommitValidationMessage> messages =
+        configValidator.validateInteger(PROJECT_CONFIG, cfg, KEY_MAX_PATH_LENGTH);
+    assertThat(messages).isNotEmpty();
+  }
+}
\ No newline at end of file