diff --git a/src/main/java/dev/micle/xptools/config/Config.java b/src/main/java/dev/micle/xptools/config/Config.java
index f7fd67a..82e80b7 100644
--- a/src/main/java/dev/micle/xptools/config/Config.java
+++ b/src/main/java/dev/micle/xptools/config/Config.java
@@ -111,7 +111,7 @@ public final class Config {
                     .comment("Examples:")
                     .comment("'minecraft:dirt,set,2,2,0,true' - Sets the xp drop of the dirt block to 2, takes highest priority and stops any additional operations.")
                     .comment("'#forge:ores,multiply,1,2,1,false' - Multiplies xp drop of all blocks tagged forge:ores by 1-2, allows additional operations.")
-                    .defineList("blockBreakOperations", List.of(), entry -> true);
+                    .defineList("blockBreakOperations", List.of(), Server::isValidOperationEntry);
             builder.pop();
 
             builder.comment("Settings for entity killing").push("entity_killing");
@@ -127,7 +127,7 @@ public final class Config {
                     .comment("Examples:")
                     .comment("'minecraft:creeper,set,2,2,0,true' - Sets the xp drop for killing creepers to 2, takes highest priority and stops any additional operations.")
                     .comment("'#some_mod:some_tag,multiply,1,2,1,false' - Multiplies the xp drop for killing all entities tagged some_mod:some_tag by 1-2, allows additional operations.")
-                    .defineList("entityKillOperations", List.of(), entry -> true);
+                    .defineList("entityKillOperations", List.of(), Server::isValidOperationEntry);
             builder.pop();
         }
 
@@ -171,5 +171,14 @@ public final class Config {
                     )
             );
         }
+
+        private static boolean isValidOperationEntry(Object entry) {
+            return entry instanceof String && ((String) entry).matches(
+                    String.format(
+                            "(?i)^(\\#?\\w+:\\w+),(%s),(\\d*\\.?\\d+),(\\d*\\.?\\d+),(\\d+),(TRUE|FALSE)$",
+                            Arrays.stream(OperationType.values()).map(OperationType::toString).collect(Collectors.joining("|"))
+                    )
+            );
+        }
     }
 }