diff --git a/Cargo.lock b/Cargo.lock
index 42ed326..51415f9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1072,7 +1072,7 @@ checksum = "c7d73b3f436185384286bd8098d17ec07c9a7d2388a6599f824d8502b529702a"
 [[package]]
 name = "libosu"
 version = "0.0.15"
-source = "git+https://github.com/iptq/libosu?rev=7fbe7afbad55b25398062719ebaccbff0387d139#7fbe7afbad55b25398062719ebaccbff0387d139"
+source = "git+https://github.com/iptq/libosu?rev=557d0a321405516f12c3939c1207c7341f796f35#557d0a321405516f12c3939c1207c7341f796f35"
 dependencies = [
  "anyhow",
  "bitflags",
diff --git a/Cargo.toml b/Cargo.toml
index ba09c69..c7369be 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,4 +24,4 @@ structopt = "0.3.21"
 
 [dependencies.libosu]
 git = "https://github.com/iptq/libosu"
-rev = "7fbe7afbad55b25398062719ebaccbff0387d139"
+rev = "557d0a321405516f12c3939c1207c7341f796f35"
diff --git a/src/game/grid.rs b/src/game/grid.rs
index d7dd8ea..89488b6 100644
--- a/src/game/grid.rs
+++ b/src/game/grid.rs
@@ -59,4 +59,14 @@ impl Game {
 
         Ok(())
     }
+
+    pub(super) fn toggle_grid(&mut self) {
+        use libosu::enums::GridSize::*;
+        self.beatmap.inner.grid_size = match self.beatmap.inner.grid_size {
+            Tiny => Small,
+            Small => Medium,
+            Medium => Large,
+            Large => Tiny,
+        };
+    }
 }
diff --git a/src/game/mod.rs b/src/game/mod.rs
index 5dc69db..96a85c9 100644
--- a/src/game/mod.rs
+++ b/src/game/mod.rs
@@ -399,6 +399,9 @@ impl EventHandler for Game {
         match keycode {
             Space => self.toggle_playing(),
             Colon => {}
+            G => {
+                self.toggle_grid();
+            }
             _ => {}
         };
     }