diff --git a/WickedEngine/wiHairParticle.cpp b/WickedEngine/wiHairParticle.cpp
index edcadd90a..ff6e603e3 100644
--- a/WickedEngine/wiHairParticle.cpp
+++ b/WickedEngine/wiHairParticle.cpp
@@ -357,10 +357,10 @@ void wiHairParticle::Generate()
 
 	GPUBufferDesc bd;
 	ZeroMemory(&bd, sizeof(bd));
-	bd.Usage = USAGE_DYNAMIC;
+	bd.Usage = USAGE_IMMUTABLE;
 	bd.ByteWidth = (UINT)(sizeof(Point) * points.size());
 	bd.BindFlags = BIND_VERTEX_BUFFER;
-	bd.CPUAccessFlags = CPU_ACCESS_WRITE;
+	bd.CPUAccessFlags = 0;
 	SubresourceData data = {};
 	data.pSysMem = points.data();
 	vb = new GPUBuffer;
diff --git a/WickedEngine/wiVersion.cpp b/WickedEngine/wiVersion.cpp
index 09f06f8fc..1ef4be6b9 100644
--- a/WickedEngine/wiVersion.cpp
+++ b/WickedEngine/wiVersion.cpp
@@ -9,7 +9,7 @@ namespace wiVersion
 	// minor features, major updates
 	const int minor = 11;
 	// minor bug fixes, alterations, refactors, updates
-	const int revision = 61;
+	const int revision = 62;
 
 
 	long GetVersion()