diff --git a/gradle.properties b/gradle.properties
index 23721f45..bdb5997c 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 mod_version=1.5.1
 api_version=1.1
-opc_api_version=3.3.2
+opc_api_version=3.4.1
 mc_ver=1.7.10
 forge_ver=10.13.4.1558-1.7.10
\ No newline at end of file
diff --git a/src/main/java/openblocks/integration/AdapterCannon.java b/src/main/java/openblocks/integration/AdapterCannon.java
index 21ebdfb2..a581c809 100644
--- a/src/main/java/openblocks/integration/AdapterCannon.java
+++ b/src/main/java/openblocks/integration/AdapterCannon.java
@@ -4,7 +4,9 @@ import openblocks.common.tileentity.TileEntityCannon;
 import openperipheral.api.adapter.IPeripheralAdapter;
 import openperipheral.api.adapter.method.Arg;
 import openperipheral.api.adapter.method.ScriptCallable;
+import openperipheral.api.architecture.FeatureGroup;
 
+@FeatureGroup("openblocks-cannon")
 public class AdapterCannon implements IPeripheralAdapter {
 
 	@Override
diff --git a/src/main/java/openblocks/integration/AdapterDonationStation.java b/src/main/java/openblocks/integration/AdapterDonationStation.java
index 0ec5b91d..639f1095 100644
--- a/src/main/java/openblocks/integration/AdapterDonationStation.java
+++ b/src/main/java/openblocks/integration/AdapterDonationStation.java
@@ -5,8 +5,10 @@ import openperipheral.api.adapter.IPeripheralAdapter;
 import openperipheral.api.adapter.method.IMultiReturn;
 import openperipheral.api.adapter.method.ReturnType;
 import openperipheral.api.adapter.method.ScriptCallable;
+import openperipheral.api.architecture.FeatureGroup;
 import openperipheral.api.helpers.MultiReturn;
 
+@FeatureGroup("openblocks-donation-station")
 public class AdapterDonationStation implements IPeripheralAdapter {
 
 	@Override
diff --git a/src/main/java/openblocks/integration/AdapterProjector.java b/src/main/java/openblocks/integration/AdapterProjector.java
index 8bde04af..dcd46073 100644
--- a/src/main/java/openblocks/integration/AdapterProjector.java
+++ b/src/main/java/openblocks/integration/AdapterProjector.java
@@ -9,6 +9,7 @@ import openblocks.common.tileentity.TileEntityProjector;
 import openperipheral.api.adapter.Asynchronous;
 import openperipheral.api.adapter.IPeripheralAdapter;
 import openperipheral.api.adapter.method.*;
+import openperipheral.api.architecture.FeatureGroup;
 import openperipheral.api.helpers.MultiReturn;
 
 import org.apache.commons.lang3.ArrayUtils;
@@ -17,6 +18,7 @@ import com.google.common.base.Preconditions;
 import com.google.common.collect.Maps;
 import com.google.common.primitives.UnsignedBytes;
 
+@FeatureGroup("openblocks-projector")
 public class AdapterProjector implements IPeripheralAdapter {
 
 	@Override
diff --git a/src/main/java/openblocks/integration/AdapterVillageHighlighter.java b/src/main/java/openblocks/integration/AdapterVillageHighlighter.java
index 365ab336..9985ecac 100644
--- a/src/main/java/openblocks/integration/AdapterVillageHighlighter.java
+++ b/src/main/java/openblocks/integration/AdapterVillageHighlighter.java
@@ -8,9 +8,11 @@ import openblocks.common.tileentity.TileEntityVillageHighlighter;
 import openperipheral.api.adapter.IPeripheralAdapter;
 import openperipheral.api.adapter.method.ReturnType;
 import openperipheral.api.adapter.method.ScriptCallable;
+import openperipheral.api.architecture.FeatureGroup;
 
 import com.google.common.collect.Maps;
 
+@FeatureGroup("openblocks-village-highlighter")
 public class AdapterVillageHighlighter implements IPeripheralAdapter {
 
 	@Override