diff --git a/agb-image-converter/Cargo.toml b/agb-image-converter/Cargo.toml
index 640646d3..874c91ef 100644
--- a/agb-image-converter/Cargo.toml
+++ b/agb-image-converter/Cargo.toml
@@ -2,7 +2,7 @@
 name = "agb_image_converter"
 version = "0.13.0"
 authors = ["Gwilym Kuiper <gw@ilym.me>"]
-edition = "2018"
+edition = "2021"
 license = "MPL-2.0"
 description = "Library for converting graphics for use on the Game Boy Advance"
 repository = "https://github.com/agbrs/agb"
diff --git a/agb-macros/Cargo.toml b/agb-macros/Cargo.toml
index e99e40cb..f7c8c167 100644
--- a/agb-macros/Cargo.toml
+++ b/agb-macros/Cargo.toml
@@ -2,7 +2,7 @@
 name = "agb_macros"
 version = "0.13.0"
 authors = ["Gwilym Kuiper <gw@ilym.me>"]
-edition = "2018"
+edition = "2021"
 license = "MPL-2.0"
 description = "Macro for declaring the entry point for a game using the agb library"
 repository = "https://github.com/agbrs/agb"
diff --git a/agb-sound-converter/Cargo.toml b/agb-sound-converter/Cargo.toml
index ad1ed104..147f4c2c 100644
--- a/agb-sound-converter/Cargo.toml
+++ b/agb-sound-converter/Cargo.toml
@@ -2,7 +2,7 @@
 name = "agb_sound_converter"
 version = "0.13.0"
 authors = ["Gwilym Kuiper <gw@ilym.me>"]
-edition = "2018"
+edition = "2021"
 license = "MPL-2.0"
 description = "Library for converting wavs for use on the Game Boy Advance"
 repository = "https://github.com/agbrs/agb"
diff --git a/book/games/pong/Cargo.toml b/book/games/pong/Cargo.toml
index 1ce429ba..c13ae22b 100644
--- a/book/games/pong/Cargo.toml
+++ b/book/games/pong/Cargo.toml
@@ -2,7 +2,7 @@
 name = "pong"
 version = "0.1.0"
 authors = ["Gwilym Kuiper <gw@ilym.me>"]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/examples/hyperspace-roll/Cargo.toml b/examples/hyperspace-roll/Cargo.toml
index 1e7fa990..c36eee96 100644
--- a/examples/hyperspace-roll/Cargo.toml
+++ b/examples/hyperspace-roll/Cargo.toml
@@ -2,7 +2,7 @@
 name = "hyperspace-roll"
 version = "0.1.0"
 authors = [""]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/examples/the-hat-chooses-the-wizard/Cargo.toml b/examples/the-hat-chooses-the-wizard/Cargo.toml
index ce704184..3fd5fc07 100644
--- a/examples/the-hat-chooses-the-wizard/Cargo.toml
+++ b/examples/the-hat-chooses-the-wizard/Cargo.toml
@@ -2,7 +2,7 @@
 name = "the-hat-chooses-the-wizard"
 version = "0.1.0"
 authors = ["Corwin Kuiper <corwin@kuiper.dev>", "Gwilym Kuiper <gw@ilym.me>"]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/examples/the-purple-night/Cargo.toml b/examples/the-purple-night/Cargo.toml
index 4368a0d4..82284aba 100644
--- a/examples/the-purple-night/Cargo.toml
+++ b/examples/the-purple-night/Cargo.toml
@@ -2,7 +2,7 @@
 name = "the-purple-night"
 version = "0.1.0"
 authors = ["Corwin Kuiper <corwin@kuiper.dev>", "Gwilym Kuiper <gw@ilym.me>", "Sam Williams"]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/mgba-test-runner/Cargo.toml b/mgba-test-runner/Cargo.toml
index cd9f5df3..a309d884 100644
--- a/mgba-test-runner/Cargo.toml
+++ b/mgba-test-runner/Cargo.toml
@@ -2,7 +2,7 @@
 name = "mgba-test-runner"
 version = "0.1.0"
 authors = ["Corwin Kuiper <corwin@kuiper.dev>"]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/template/Cargo.toml b/template/Cargo.toml
index f5b657cb..d1efdf60 100644
--- a/template/Cargo.toml
+++ b/template/Cargo.toml
@@ -2,7 +2,7 @@
 name = "agb_template"
 version = "0.1.0"
 authors = [""]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html