diff --git a/package-lock.json b/package-lock.json
index b74d12ecd35..c6dfdd7be04 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "pokemon-rogue-battle",
-	"version": "1.7.3",
+	"version": "1.7.4",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "pokemon-rogue-battle",
-			"version": "1.7.3",
+			"version": "1.7.4",
 			"hasInstallScript": true,
 			"dependencies": {
 				"@material/material-color-utilities": "^0.2.7",
diff --git a/package.json b/package.json
index de543ce2bf2..19f64b56157 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "pokemon-rogue-battle",
 	"private": true,
-	"version": "1.7.3",
+	"version": "1.7.4",
 	"type": "module",
 	"scripts": {
 		"start": "vite",
diff --git a/src/data/trainer-config.ts b/src/data/trainer-config.ts
index a0158f28238..21b04c182e6 100644
--- a/src/data/trainer-config.ts
+++ b/src/data/trainer-config.ts
@@ -607,7 +607,7 @@ export class TrainerConfig {
       const shedinjaCanTera = !this.hasSpecialtyType() || this.specialtyType === Type.BUG; // Better to check one time than 6
       const partyMemberIndexes = new Array(party.length).fill(null).map((_, i) => i)
         .filter(i => shedinjaCanTera || party[i].species.speciesId !== Species.SHEDINJA); // Shedinja can only Tera on Bug specialty type (or no specialty type)
-      const setPartySlot = !Utils.isNullOrUndefined(slot) ? Phaser.Math.Wrap(slot, 0, party.length - 1) : -1; // If we have a tera slot defined, wrap it to party size.
+      const setPartySlot = !Utils.isNullOrUndefined(slot) ? Phaser.Math.Wrap(slot, 0, party.length) : -1; // If we have a tera slot defined, wrap it to party size.
       for (let t = 0; t < Math.min(count(), party.length); t++) {
         const randomIndex = partyMemberIndexes.indexOf(setPartySlot) > -1 ? setPartySlot : Utils.randSeedItem(partyMemberIndexes);
         partyMemberIndexes.splice(partyMemberIndexes.indexOf(randomIndex), 1);