diff --git a/src/main/java/org/spacehq/packetlib/io/buffer/ByteBufferNetInput.java b/src/main/java/org/spacehq/packetlib/io/buffer/ByteBufferNetInput.java
index af2e051b..9c71c128 100644
--- a/src/main/java/org/spacehq/packetlib/io/buffer/ByteBufferNetInput.java
+++ b/src/main/java/org/spacehq/packetlib/io/buffer/ByteBufferNetInput.java
@@ -77,17 +77,17 @@ public class ByteBufferNetInput implements NetInput {
 
     @Override
     public long readVarLong() throws IOException {
-        int value = 0;
+        long value = 0;
         int size = 0;
         int b;
         while(((b = this.readByte()) & 0x80) == 0x80) {
-            value |= (b & 0x7F) << (size++ * 7);
+            value |= (long) (b & 0x7F) << (size++ * 7);
             if(size > 10) {
                 throw new IOException("VarLong too long (length must be <= 10)");
             }
         }
 
-        return value | ((b & 0x7F) << (size * 7));
+        return value | ((long) (b & 0x7F) << (size * 7));
     }
 
     @Override
diff --git a/src/main/java/org/spacehq/packetlib/io/stream/StreamNetInput.java b/src/main/java/org/spacehq/packetlib/io/stream/StreamNetInput.java
index 69d1d1b4..3433f4fe 100644
--- a/src/main/java/org/spacehq/packetlib/io/stream/StreamNetInput.java
+++ b/src/main/java/org/spacehq/packetlib/io/stream/StreamNetInput.java
@@ -93,17 +93,17 @@ public class StreamNetInput implements NetInput {
 
     @Override
     public long readVarLong() throws IOException {
-        int value = 0;
+        long value = 0;
         int size = 0;
         int b;
         while(((b = this.readByte()) & 0x80) == 0x80) {
-            value |= (b & 0x7F) << (size++ * 7);
+            value |= (long) (b & 0x7F) << (size++ * 7);
             if(size > 10) {
                 throw new IOException("VarLong too long (length must be <= 10)");
             }
         }
 
-        return value | ((b & 0x7F) << (size * 7));
+        return value | ((long) (b & 0x7F) << (size * 7));
     }
 
     @Override