diff --git a/src/entity/player.cpp b/src/entity/player.cpp
index 6833776..5185b8e 100644
--- a/src/entity/player.cpp
+++ b/src/entity/player.cpp
@@ -52,7 +52,7 @@ void player::update(const ce::input &input, const ce::level &level)
 	}
 	else
 	{
-		velocity.y -= gravity;
+		velocity.y += gravity;
 	}
 
 #ifndef NDEBUG
diff --git a/src/entity/player.hpp b/src/entity/player.hpp
index 4265058..8fe071c 100644
--- a/src/entity/player.hpp
+++ b/src/entity/player.hpp
@@ -35,8 +35,8 @@ class player: public ce::animated_sprite
 	static constexpr float move_acceleration = 1.F;
 	static constexpr float move_deceleration = -1.1F;
 
-	static constexpr float jump_force = 1.F;
-	static constexpr float gravity = -0.F;
+	static constexpr float jump_force = -1.F;
+	static constexpr float gravity = 0.1F;
 
 	static constexpr float speed_limit = 10.F;