diff --git a/pom.xml b/pom.xml
index c243219..3db6cb3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -93,12 +93,6 @@
 			<version>1.7</version>
 			<scope>provided</scope>
 		</dependency>
-		<dependency>
-			<groupId>com.github.TechFortress</groupId>
-			<artifactId>GriefPrevention</artifactId>
-			<version>16.11.6</version>
-			<scope>provided</scope>
-		</dependency>
 		<dependency>
 	        <groupId>co.aikar</groupId>
 	        <artifactId>acf-bukkit</artifactId>
@@ -110,5 +104,11 @@
 	        <version>2.16.1</version>
 	        <scope>provided</scope>
 	    </dependency>
+	    <dependency>
+		    <groupId>com.github.EtienneDx</groupId>
+		    <artifactId>GriefPrevention</artifactId>
+		    <version>master-SNAPSHOT</version>
+		    <scope>provided</scope>
+		</dependency>
 	</dependencies>
 </project>
\ No newline at end of file
diff --git a/src/me/EtienneDx/RealEstate/GP_RealEstateHook.java b/src/me/EtienneDx/RealEstate/GP_RealEstateHook.java
new file mode 100644
index 0000000..874af49
--- /dev/null
+++ b/src/me/EtienneDx/RealEstate/GP_RealEstateHook.java
@@ -0,0 +1,78 @@
+package me.EtienneDx.RealEstate;
+
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+
+import me.EtienneDx.RealEstate.Transactions.BoughtTransaction;
+import me.EtienneDx.RealEstate.Transactions.Transaction;
+import me.ryanhamshire.GriefPrevention.Claim;
+import me.ryanhamshire.GriefPrevention.IRealEstate;
+
+public class GP_RealEstateHook implements IRealEstate
+{
+	@Override
+	public String allowEdit(Claim claim, Player player)
+	{
+		Transaction b = RealEstate.transactionsStore.getTransaction(claim);
+		if(b != null && b.getOwner().equals(player.getUniqueId()) && b instanceof BoughtTransaction)
+		{
+			if(((BoughtTransaction)b).getBuyer() != null)
+				return "This claim is currently involved in a transaction, you can't edit it!";
+		}
+		return null;
+	}
+
+	@Override
+	public String allowBuild(Claim claim, Player player, Material material)
+	{
+		Transaction b = RealEstate.transactionsStore.getTransaction(claim);
+		if(b != null && b.getOwner().equals(player.getUniqueId()) && b instanceof BoughtTransaction)
+		{
+			if(((BoughtTransaction)b).getBuyer() != null)
+				return "This claim is currently involved in a transaction, you can't build on it!";
+		}
+		return null;
+	}
+
+	@Override
+	public String allowAccess(Claim claim, Player player)
+	{
+		Transaction b = RealEstate.transactionsStore.getTransaction(claim);
+		if(b != null && b.getOwner().equals(player.getUniqueId()) && b instanceof BoughtTransaction)
+		{
+			if(((BoughtTransaction)b).getBuyer() != null)
+				return "This claim is currently involved in a transaction, you can't access it!";
+		}
+		return null;
+	}
+
+	@Override
+	public String allowContainers(Claim claim, Player player)
+	{
+		Transaction b = RealEstate.transactionsStore.getTransaction(claim);
+		if(b != null && b.getOwner().equals(player.getUniqueId()) && b instanceof BoughtTransaction)
+		{
+			if(((BoughtTransaction)b).getBuyer() != null)
+				return "This claim is currently involved in a transaction, you can't access it's containers!";
+		}
+		return null;
+	}
+
+	@Override
+	public String allowGrantPermission(Claim claim, Player player)
+	{
+		Transaction b = RealEstate.transactionsStore.getTransaction(claim);
+		if(b != null && b instanceof BoughtTransaction)
+		{
+			if(((BoughtTransaction)b).getBuyer() != null)
+				return "This claim is currently involved in a transaction, you can't change any permission!";
+		}
+		return null;
+	}
+
+	@Override
+	public boolean anyTransaction(Claim claim)
+	{
+		return RealEstate.transactionsStore.anyTransaction(claim);
+	}
+}
diff --git a/src/me/EtienneDx/RealEstate/RealEstate.java b/src/me/EtienneDx/RealEstate/RealEstate.java
index c95ca81..18ce9f1 100644
--- a/src/me/EtienneDx/RealEstate/RealEstate.java
+++ b/src/me/EtienneDx/RealEstate/RealEstate.java
@@ -94,6 +94,8 @@ public class RealEstate extends JavaPlugin
         manager.enableUnstableAPI("help");
         registerConditions();
         manager.registerCommand(new RECommand());
+        
+        GriefPrevention.realEstate = new GP_RealEstateHook();
 	}
 
     private void registerConditions()