diff --git a/index.html b/index.html
index 43e50bf..0457ae5 100644
--- a/index.html
+++ b/index.html
@@ -433,6 +433,7 @@
              speed: document.getElementById("inp-pool-edge-speed"),
              intellect: document.getElementById("inp-pool-edge-intellect"),
          };
+         const inpAbilityEffort = document.getElementById("inp-ability-effort");
 
          const dspAbilityPool = document.getElementById("dsp-ability-pool");
 
@@ -655,6 +656,15 @@
              }
          };
 
+         const abilityEffortChanged = () => {
+             var maxEffort = Number(inpMaxEffort.value);
+             var abilityEffort = Number(inpAbilityEffort.value);
+
+             if (abilityEffort > maxEffort) {
+                 inpAbilityEffort.value = maxEffort;
+             }
+         };
+
          document.addEventListener(
              "DOMContentLoaded",
              () => {
@@ -671,6 +681,8 @@
                      .querySelectorAll("input[name=pool-selector]")
                      .forEach((elem) => {elem.addEventListener("change", poolSelectionChanged)});
 
+                 inpAbilityEffort.addEventListener("input", abilityEffortChanged);
+
                  btnNoCharCreateCharacter.addEventListener("click", createCharacter);
                  btnCreateCharacter.addEventListener("click", createCharacter);
                  btnSaveCharacter.addEventListener("click", saveCurrentCharacter);