diff --git a/crdt-enc-gpgme/Cargo.toml b/crdt-enc-gpgme/Cargo.toml
index 3fbfa07..e5ff1c0 100644
--- a/crdt-enc-gpgme/Cargo.toml
+++ b/crdt-enc-gpgme/Cargo.toml
@@ -2,7 +2,7 @@
 name = "crdt-enc-gpgme"
 version = "0.1.0"
 authors = ["Thomas Heck <t@b128.net>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 serde = "1"
diff --git a/crdt-enc-tokio/Cargo.toml b/crdt-enc-tokio/Cargo.toml
index d3d673e..b2b5d65 100644
--- a/crdt-enc-tokio/Cargo.toml
+++ b/crdt-enc-tokio/Cargo.toml
@@ -2,7 +2,7 @@
 name = "crdt-enc-tokio"
 version = "0.1.0"
 authors = ["Thomas Heck <t@b128.net>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 crdts = "7"
diff --git a/crdt-enc-xchacha20poly1305/Cargo.toml b/crdt-enc-xchacha20poly1305/Cargo.toml
index 8f504f2..d278a99 100644
--- a/crdt-enc-xchacha20poly1305/Cargo.toml
+++ b/crdt-enc-xchacha20poly1305/Cargo.toml
@@ -2,7 +2,7 @@
 name = "crdt-enc-xchacha20poly1305"
 version = "0.1.0"
 authors = ["Thomas Heck <t@b128.net>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 crdts = "7"
diff --git a/crdt-enc/Cargo.toml b/crdt-enc/Cargo.toml
index 3d907a7..6da51ae 100644
--- a/crdt-enc/Cargo.toml
+++ b/crdt-enc/Cargo.toml
@@ -2,7 +2,7 @@
 name = "crdt-enc"
 version = "0.1.0"
 authors = ["Thomas Heck <t@b128.net>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 crdts = "7"
diff --git a/examples/test/Cargo.toml b/examples/test/Cargo.toml
index e23074d..32eb90c 100644
--- a/examples/test/Cargo.toml
+++ b/examples/test/Cargo.toml
@@ -2,7 +2,7 @@
 name = "example-test"
 version = "0.1.0"
 authors = ["Thomas Heck <t@b128.net>"]
-edition = "2018"
+edition = "2021"
 
 [dependencies]
 crdt-enc = {path="../../crdt-enc"}