diff --git a/card-backend/Cargo.toml b/card-backend/Cargo.toml
index 17f9266..4afb3f5 100644
--- a/card-backend/Cargo.toml
+++ b/card-backend/Cargo.toml
@@ -6,7 +6,7 @@ name = "card-backend"
 description = "Card backend trait, for use with the openpgp-card crate"
 authors = ["Heiko Schaefer <heiko@schaefer.name>"]
 license = "MIT OR Apache-2.0"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2018"
 repository = "https://gitlab.com/openpgp-card/openpgp-card"
 documentation = "https://docs.rs/crate/card-backend"
diff --git a/openpgp-card-sequoia/Cargo.toml b/openpgp-card-sequoia/Cargo.toml
index 73027c7..c3a0ad7 100644
--- a/openpgp-card-sequoia/Cargo.toml
+++ b/openpgp-card-sequoia/Cargo.toml
@@ -12,7 +12,7 @@ repository = "https://gitlab.com/openpgp-card/openpgp-card"
 documentation = "https://docs.rs/crate/openpgp-card-sequoia"
 
 [dependencies]
-card-backend = { path = "../card-backend", version = "0.1" }
+card-backend = { path = "../card-backend", version = "0.2" }
 sequoia-openpgp = { version = "1.4", default-features = false }
 openpgp-card = { path = "../openpgp-card", version = "0.4" }
 chrono = "0.4"
@@ -22,8 +22,8 @@ log = "0.4"
 rsa = "0.8.1"
 
 [dev-dependencies]
-card-backend-pcsc = { path = "../pcsc", version = "0.4" }
-#card-backend-scdc = { path = "../scdc", version = "0.4" }
+card-backend-pcsc = { path = "../pcsc", version = "0.5" }
+#card-backend-scdc = { path = "../scdc", version = "0.5" }
 env_logger = "0.10"
 testresult = "0.3.0"
 
diff --git a/openpgp-card/Cargo.toml b/openpgp-card/Cargo.toml
index 4b2a448..74aabb1 100644
--- a/openpgp-card/Cargo.toml
+++ b/openpgp-card/Cargo.toml
@@ -12,7 +12,7 @@ repository = "https://gitlab.com/openpgp-card/openpgp-card"
 documentation = "https://docs.rs/crate/openpgp-card"
 
 [dependencies]
-card-backend = { path = "../card-backend", version = "0.1" }
+card-backend = { path = "../card-backend", version = "0.2" }
 nom = "7"
 hex-slice = "0.1"
 thiserror = "1"
diff --git a/pcsc/Cargo.toml b/pcsc/Cargo.toml
index e6a69c9..2149b80 100644
--- a/pcsc/Cargo.toml
+++ b/pcsc/Cargo.toml
@@ -6,13 +6,13 @@ name = "card-backend-pcsc"
 description = "PCSC card backend, e.g. for use with the openpgp-card crate"
 authors = ["Heiko Schaefer <heiko@schaefer.name>"]
 license = "MIT OR Apache-2.0"
-version = "0.4.0"
+version = "0.5.0"
 edition = "2018"
 repository = "https://gitlab.com/openpgp-card/openpgp-card"
 documentation = "https://docs.rs/crate/card-backend-pcsc"
 
 [dependencies]
-card-backend = { path = "../card-backend", version = "0.1" }
+card-backend = { path = "../card-backend", version = "0.2" }
 iso7816-tlv = "0.4"
 pcsc = "2.7"
 log = "0.4"
diff --git a/scdc/Cargo.toml b/scdc/Cargo.toml
index 38b5ccd..c6485d8 100644
--- a/scdc/Cargo.toml
+++ b/scdc/Cargo.toml
@@ -6,13 +6,13 @@ name = "card-backend-scdc"
 description = "Experimental SCDaemon Client, e.g. for use with the openpgp-card crate"
 authors = ["Heiko Schaefer <heiko@schaefer.name>"]
 license = "MIT OR Apache-2.0"
-version = "0.4.0"
+version = "0.5.0"
 edition = "2018"
 repository = "https://gitlab.com/openpgp-card/openpgp-card"
 documentation = "https://docs.rs/crate/openpgp-card-scdc"
 
 [dependencies]
-card-backend = { path = "../card-backend", version = "0.1" }
+card-backend = { path = "../card-backend", version = "0.2" }
 sequoia-ipc = "0.29"
 hex = "0.4"
 futures = "0.3"