diff --git a/pom.xml b/pom.xml
index 24b512526..f0a66b601 100644
--- a/pom.xml
+++ b/pom.xml
@@ -142,6 +142,22 @@
       <type>jar</type>
     </dependency>
 
+    <!-- JSON parser -->
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <version>2.2.4</version>
+      <optional>true</optional>
+    </dependency>
+
+    <!-- Optimized collections -->
+    <dependency>
+      <groupId>net.sf.trove4j</groupId>
+      <artifactId>trove4j</artifactId>
+      <version>3.0.3</version>
+      <optional>true</optional>
+    </dependency>
+
     <!-- @Nullable etc. -->
     <dependency>
       <groupId>com.google.code.findbugs</groupId>
@@ -367,12 +383,25 @@
               <goal>shade</goal>
             </goals>
             <configuration>
+              <minimizeJar>true</minimizeJar>
               <artifactSet>
                 <includes>
                   <include>com.sk89q:jchronic</include>
                   <include>com.thoughtworks.paranamer:paranamer</include>
+                  <include>com.google.code.gson:gson</include>
+                  <include>net.sf.trove4j:trove4j</include>
                 </includes>
               </artifactSet>
+              <relocations>
+                <relocation>
+                  <pattern>gnu.trove</pattern>
+                  <shadedPattern>com.sk89q.worldedit.internal.trove</shadedPattern>
+                </relocation>
+                <relocation>
+                  <pattern>com.google.gson</pattern>
+                  <shadedPattern>com.sk89q.worldedit.internal.gson</shadedPattern>
+                </relocation>
+              </relocations>
             </configuration>
           </execution>
         </executions>
diff --git a/src/main/build/import-control.xml b/src/main/build/import-control.xml
index 9ef48920d..9bb8d7a3d 100644
--- a/src/main/build/import-control.xml
+++ b/src/main/build/import-control.xml
@@ -10,6 +10,8 @@
   <allow pkg="com.sk89q"/>
   <allow pkg="com.google.common"/>
   <allow pkg="com.thoughtworks.paranamer"/>
+  <allow pkg="gnu.trove"/>
+  <allow pkg="com.google.gson"/>
 
   <subpackage name="util.yaml">
     <allow pkg="org.yaml.snakeyaml"/>