diff --git a/README.md b/README.md
index 90bf9be0..9208e387 100644
--- a/README.md
+++ b/README.md
@@ -20,25 +20,25 @@ This is the full portfolio of protocolize dependencies:
 <dependency>
   <groupId>de.exceptionflug</groupId>
   <artifactId>protocolize-api</artifactId>
-  <version>1.3.1-SNAPSHOT</version>
+  <version>1.3.2-SNAPSHOT</version>
   <scope>provided</scope>
 </dependency>
 <dependency>
   <groupId>de.exceptionflug</groupId>
   <artifactId>protocolize-items</artifactId>
-  <version>1.3.1-SNAPSHOT</version>
+  <version>1.3.2-SNAPSHOT</version>
   <scope>provided</scope>
 </dependency>
 <dependency>
   <groupId>de.exceptionflug</groupId>
   <artifactId>protocolize-inventory</artifactId>
-  <version>1.3.1-SNAPSHOT</version>
+  <version>1.3.2-SNAPSHOT</version>
   <scope>provided</scope>
 </dependency>
 <dependency>
   <groupId>de.exceptionflug</groupId>
   <artifactId>protocolize-world</artifactId>
-  <version>1.3.1-SNAPSHOT</version>
+  <version>1.3.2-SNAPSHOT</version>
   <scope>provided</scope>
 </dependency>
 ```
diff --git a/pom.xml b/pom.xml
index d325ad6e..f56c87dc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>de.exceptionflug</groupId>
     <artifactId>protocolize</artifactId>
-    <version>1.3.1-SNAPSHOT</version>
+    <version>1.3.2-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <modules>
diff --git a/protocolize-api/pom.xml b/protocolize-api/pom.xml
index 8aa93d85..cfb24d5b 100644
--- a/protocolize-api/pom.xml
+++ b/protocolize-api/pom.xml
@@ -46,7 +46,7 @@
     <parent>
         <groupId>de.exceptionflug</groupId>
         <artifactId>protocolize</artifactId>
-        <version>1.3.1-SNAPSHOT</version>
+        <version>1.3.2-SNAPSHOT</version>
     </parent>
 
     <groupId>de.exceptionflug</groupId>
diff --git a/protocolize-examples/pom.xml b/protocolize-examples/pom.xml
index 4c3a1dfc..e21bdc41 100644
--- a/protocolize-examples/pom.xml
+++ b/protocolize-examples/pom.xml
@@ -7,7 +7,7 @@
     <parent>
         <groupId>de.exceptionflug</groupId>
         <artifactId>protocolize</artifactId>
-        <version>1.3.1-SNAPSHOT</version>
+        <version>1.3.2-SNAPSHOT</version>
     </parent>
 
     <groupId>de.exceptionflug</groupId>
@@ -18,19 +18,19 @@
         <dependency>
             <groupId>de.exceptionflug</groupId>
             <artifactId>protocolize-api</artifactId>
-            <version>1.3.1-SNAPSHOT</version>
+            <version>1.3.2-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>de.exceptionflug</groupId>
             <artifactId>protocolize-items</artifactId>
-            <version>1.3.1-SNAPSHOT</version>
+            <version>1.3.2-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>de.exceptionflug</groupId>
             <artifactId>protocolize-inventory</artifactId>
-            <version>1.3.1-SNAPSHOT</version>
+            <version>1.3.2-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
     </dependencies>
diff --git a/protocolize-inventory/pom.xml b/protocolize-inventory/pom.xml
index 7a097be2..4c534e17 100644
--- a/protocolize-inventory/pom.xml
+++ b/protocolize-inventory/pom.xml
@@ -19,7 +19,7 @@
     <parent>
         <groupId>de.exceptionflug</groupId>
         <artifactId>protocolize</artifactId>
-        <version>1.3.1-SNAPSHOT</version>
+        <version>1.3.2-SNAPSHOT</version>
     </parent>
 
     <groupId>de.exceptionflug</groupId>
diff --git a/protocolize-inventory/src/main/java/de/exceptionflug/protocolize/inventory/InventoryModule.java b/protocolize-inventory/src/main/java/de/exceptionflug/protocolize/inventory/InventoryModule.java
index c97a187d..750848c0 100644
--- a/protocolize-inventory/src/main/java/de/exceptionflug/protocolize/inventory/InventoryModule.java
+++ b/protocolize-inventory/src/main/java/de/exceptionflug/protocolize/inventory/InventoryModule.java
@@ -93,7 +93,7 @@ public static Inventory getInventory(final UUID playerId, final int windowId) {
             out.setHomebrew(false);
             return out;
         }
-        return WINDOW_MAP.computeIfAbsent(playerId, (id) -> Maps.newHashMap()).get(windowId);
+        return WINDOW_MAP.computeIfAbsent(playerId, (id) -> new ConcurrentHashMap<>()).get(windowId);
     }
 
     public static void uncache(final UUID playerId) {
diff --git a/protocolize-items/pom.xml b/protocolize-items/pom.xml
index 4c6575c4..d88a74a2 100644
--- a/protocolize-items/pom.xml
+++ b/protocolize-items/pom.xml
@@ -19,7 +19,7 @@
     <parent>
         <groupId>de.exceptionflug</groupId>
         <artifactId>protocolize</artifactId>
-        <version>1.3.1-SNAPSHOT</version>
+        <version>1.3.2-SNAPSHOT</version>
     </parent>
 
     <groupId>de.exceptionflug</groupId>
diff --git a/protocolize-plugin/pom.xml b/protocolize-plugin/pom.xml
index ecbeb306..98965a7a 100644
--- a/protocolize-plugin/pom.xml
+++ b/protocolize-plugin/pom.xml
@@ -7,12 +7,12 @@
     <parent>
         <groupId>de.exceptionflug</groupId>
         <artifactId>protocolize</artifactId>
-        <version>1.3.1-SNAPSHOT</version>
+        <version>1.3.2-SNAPSHOT</version>
     </parent>
 
     <groupId>de.exceptionflug</groupId>
     <artifactId>protocolize-plugin</artifactId>
-    <version>1.3.1-SNAPSHOT</version>
+    <version>1.3.2-SNAPSHOT</version>
 
     <properties>
         <plugin.main>de.exceptionflug.protocolize.ProtocolizePlugin</plugin.main>
@@ -23,22 +23,22 @@
         <dependency>
             <groupId>de.exceptionflug</groupId>
             <artifactId>protocolize-api</artifactId>
-            <version>1.3.1-SNAPSHOT</version>
+            <version>1.3.2-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>de.exceptionflug</groupId>
             <artifactId>protocolize-items</artifactId>
-            <version>1.3.1-SNAPSHOT</version>
+            <version>1.3.2-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>de.exceptionflug</groupId>
             <artifactId>protocolize-world</artifactId>
-            <version>1.3.1-SNAPSHOT</version>
+            <version>1.3.2-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>de.exceptionflug</groupId>
             <artifactId>protocolize-inventory</artifactId>
-            <version>1.3.1-SNAPSHOT</version>
+            <version>1.3.2-SNAPSHOT</version>
         </dependency>
     </dependencies>
 
diff --git a/protocolize-util/pom.xml b/protocolize-util/pom.xml
index 0026624f..67f417f2 100644
--- a/protocolize-util/pom.xml
+++ b/protocolize-util/pom.xml
@@ -19,7 +19,7 @@
     <parent>
         <groupId>de.exceptionflug</groupId>
         <artifactId>protocolize</artifactId>
-        <version>1.3.1-SNAPSHOT</version>
+        <version>1.3.2-SNAPSHOT</version>
     </parent>
 
     <groupId>de.exceptionflug</groupId>
diff --git a/protocolize-world/pom.xml b/protocolize-world/pom.xml
index 283e8910..7f4abbbc 100644
--- a/protocolize-world/pom.xml
+++ b/protocolize-world/pom.xml
@@ -19,7 +19,7 @@
     <parent>
         <groupId>de.exceptionflug</groupId>
         <artifactId>protocolize</artifactId>
-        <version>1.3.1-SNAPSHOT</version>
+        <version>1.3.2-SNAPSHOT</version>
     </parent>
 
     <groupId>de.exceptionflug</groupId>