diff --git a/Cargo.toml b/Cargo.toml
index 2eb11b9..da4bdb3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ libloading = "0.4.0"
 wayland-client = { version = "0.21.1", features = ["egl"], optional = true }
 winit = { version = "0.18.0", optional = true }
 drm = { version = "^0.3.4", optional = true }
-gbm = { version = "^0.4.0", optional = true, default-features = false, features = ["drm-support"] }
+gbm = { version = "^0.5.0", optional = true, default-features = false, features = ["drm-support"] }
 glium = { version = "0.19.0", optional = true, default-features = false }
 input = { version = "0.4.1", optional = true }
 udev = { version = "0.2.0", optional = true }
diff --git a/src/backend/drm/gbm/egl.rs b/src/backend/drm/gbm/egl.rs
index 6fdd0ff..cf9268b 100644
--- a/src/backend/drm/gbm/egl.rs
+++ b/src/backend/drm/gbm/egl.rs
@@ -88,6 +88,6 @@ unsafe impl<D: RawDevice + 'static> NativeSurface for GbmSurface<D> {
     }
 
     fn swap_buffers(&self) -> ::std::result::Result<(), SwapBuffersError> {
-        self.page_flip()
+        unsafe { self.page_flip() }
     }
 }
diff --git a/src/backend/drm/gbm/surface.rs b/src/backend/drm/gbm/surface.rs
index 9bcf2b9..c6b578c 100644
--- a/src/backend/drm/gbm/surface.rs
+++ b/src/backend/drm/gbm/surface.rs
@@ -35,7 +35,7 @@ impl<D: RawDevice + 'static> GbmSurfaceInternal<D> {
         // drop and release the old buffer
     }
 
-    pub fn page_flip(&self) -> ::std::result::Result<(), SwapBuffersError> {
+    pub unsafe fn page_flip(&self) -> ::std::result::Result<(), SwapBuffersError> {
         let res = {
             let nb = self.next_buffer.take();
             let res = nb.is_some();
@@ -287,7 +287,7 @@ impl<D: RawDevice + 'static> GbmSurface<D> {
     /// *Note*: This might trigger a full modeset on the underlying device,
     /// potentially causing some flickering. In that case this operation is
     /// blocking until the crtc is in the desired state.
-    pub fn page_flip(&self) -> ::std::result::Result<(), SwapBuffersError> {
+    pub unsafe fn page_flip(&self) -> ::std::result::Result<(), SwapBuffersError> {
         self.0.page_flip()
     }