diff --git a/.github/workflows/main-php-matrix.yml b/.github/workflows/main-php-matrix.yml
index 846459748f4..b81ac8b460c 100644
--- a/.github/workflows/main-php-matrix.yml
+++ b/.github/workflows/main-php-matrix.yml
@@ -30,7 +30,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup PHP
-        uses: pmmp/setup-php-action@3.0.0
+        uses: pmmp/setup-php-action@3.1.0
         with:
           php-version: ${{ inputs.php }}
           install-path: "./bin"
@@ -62,7 +62,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup PHP
-        uses: pmmp/setup-php-action@3.0.0
+        uses: pmmp/setup-php-action@3.1.0
         with:
           php-version: ${{ inputs.php }}
           install-path: "./bin"
@@ -96,7 +96,7 @@ jobs:
           submodules: true
 
       - name: Setup PHP
-        uses: pmmp/setup-php-action@3.0.0
+        uses: pmmp/setup-php-action@3.1.0
         with:
           php-version: ${{ inputs.php }}
           install-path: "./bin"
@@ -128,7 +128,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Setup PHP
-        uses: pmmp/setup-php-action@3.0.0
+        uses: pmmp/setup-php-action@3.1.0
         with:
           php-version: ${{ inputs.php }}
           install-path: "./bin"
diff --git a/changelogs/5.11.md b/changelogs/5.11.md
index 96c05bf1b6c..e993dceec13 100644
--- a/changelogs/5.11.md
+++ b/changelogs/5.11.md
@@ -37,3 +37,9 @@ Released 23rd February 2024.
 
 ## Internals
 - Updated GitHub Actions versions to get rid of deprecation warnings.
+
+# 5.11.2
+Released 26th February 2024.
+
+## Fixes
+- Added extra checks for `BookEditPacket` handling.
diff --git a/src/VersionInfo.php b/src/VersionInfo.php
index 52fecb633d6..946e53a2328 100644
--- a/src/VersionInfo.php
+++ b/src/VersionInfo.php
@@ -31,7 +31,7 @@
 
 final class VersionInfo{
 	public const NAME = "PocketMine-MP";
-	public const BASE_VERSION = "5.11.2";
+	public const BASE_VERSION = "5.11.3";
 	public const IS_DEVELOPMENT_BUILD = true;
 	public const BUILD_CHANNEL = "stable";
 
diff --git a/src/network/mcpe/handler/InGamePacketHandler.php b/src/network/mcpe/handler/InGamePacketHandler.php
index 870d8acb828..d01c17c7637 100644
--- a/src/network/mcpe/handler/InGamePacketHandler.php
+++ b/src/network/mcpe/handler/InGamePacketHandler.php
@@ -877,8 +877,12 @@ private function checkBookText(string $string, string $fieldName, int $softLimit
 	}
 
 	public function handleBookEdit(BookEditPacket $packet) : bool{
+		$inventory = $this->player->getInventory();
+		if(!$inventory->slotExists($packet->inventorySlot)){
+			return false;
+		}
 		//TODO: break this up into book API things
-		$oldBook = $this->player->getInventory()->getItem($packet->inventorySlot);
+		$oldBook = $inventory->getItem($packet->inventorySlot);
 		if(!($oldBook instanceof WritableBook)){
 			return false;
 		}