--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,13 +8,19 @@ description = "Tablet emulator, for people who don’t own one"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
+[features]
+default = ["gui"]
+
+gui = ["cairo-rs", "gdk", "gio", "glib", "gtk"]
+
 [dependencies]
-cairo-rs = "0.9.1"
-gdk = "0.13.2"
-gio = "0.9.1"
-glib = "0.10.2"
-gtk = "0.9.2"
 input-linux = "0.3.0"
+bitflags = "1.2.1"
+cairo-rs = { version = "0.9.1", optional = true }
+gdk = { version = "0.13.2", optional = true }
+gio = { version = "0.9.1", optional = true }
+glib = { version = "0.10.2", optional = true }
+gtk = { version = "0.9.2", optional = true }
 
 [profile.release]
 lto = true