diff --git a/src/main/java/de/bstly/board/controller/BaseController.java b/src/main/java/de/bstly/board/controller/BaseController.java
index f75384b..6e6c34a 100644
--- a/src/main/java/de/bstly/board/controller/BaseController.java
+++ b/src/main/java/de/bstly/board/controller/BaseController.java
@@ -86,7 +86,16 @@ public class BaseController {
 			LocalUser localUser = localUserManager.getByUsername(username);
 			if (localUser.getSettings() != null && localUser.getSettings().containsKey("gravity")) {
 				try {
-					return Double.parseDouble(localUser.getSettings().get("gravity"));
+					double gravity = Double.parseDouble(localUser.getSettings().get("gravity"));
+					if (gravity < 0) {
+						return 0;
+					}
+
+					if (gravity > 2) {
+						return 2;
+					}
+
+					return gravity;
 				} catch (Exception e) {
 				}
 			}
@@ -106,7 +115,17 @@ public class BaseController {
 			if (localUser.getSettings() != null
 					&& localUser.getSettings().containsKey("commentDelay")) {
 				try {
-					return Long.parseLong(localUser.getSettings().get("commentDelay"));
+					long commentDelay = Long.parseLong(localUser.getSettings().get("commentDelay"));
+
+					if (commentDelay < 0) {
+						return 0;
+					}
+
+					if (commentDelay > 15) {
+						return 15;
+					}
+
+					return commentDelay;
 				} catch (Exception e) {
 				}
 			}