diff --git a/rustecal-core/Cargo.toml b/rustecal-core/Cargo.toml
index 4a7b484..3c542dd 100644
--- a/rustecal-core/Cargo.toml
+++ b/rustecal-core/Cargo.toml
@@ -3,6 +3,7 @@ name          = "rustecal-core"
 version       = "0.1.8"
 authors       = ["Rex Schilasky"]
 edition       = "2024"
+rust-version  = "1.85"
 description   = "Core API for Eclipse eCAL"
 license       = "Apache-2.0"
 repository    = "https://github.com/eclipse-ecal/rustecal"
diff --git a/rustecal-pubsub/Cargo.toml b/rustecal-pubsub/Cargo.toml
index 406c571..ce2017f 100644
--- a/rustecal-pubsub/Cargo.toml
+++ b/rustecal-pubsub/Cargo.toml
@@ -3,6 +3,7 @@ name          = "rustecal-pubsub"
 version       = "0.1.9"
 authors       = ["Rex Schilasky"]
 edition       = "2024"
+rust-version  = "1.85"
 description   = "Publish/Subscribe API for Eclipse eCAL"
 license       = "Apache-2.0"
 repository    = "https://github.com/eclipse-ecal/rustecal"
diff --git a/rustecal-service/Cargo.toml b/rustecal-service/Cargo.toml
index 85212c3..8fefbd1 100644
--- a/rustecal-service/Cargo.toml
+++ b/rustecal-service/Cargo.toml
@@ -3,6 +3,7 @@ name          = "rustecal-service"
 version       = "0.1.7"
 authors       = ["Rex Schilasky"]
 edition       = "2024"
+rust-version  = "1.85"
 description   = "Server/Client API for Eclipse eCAL"
 license       = "Apache-2.0"
 repository    = "https://github.com/eclipse-ecal/rustecal"
diff --git a/rustecal-sys/Cargo.toml b/rustecal-sys/Cargo.toml
index 4051254..2fe4fce 100644
--- a/rustecal-sys/Cargo.toml
+++ b/rustecal-sys/Cargo.toml
@@ -3,6 +3,7 @@ name          = "rustecal-sys"
 version       = "0.1.7"
 authors       = ["Rex Schilasky"]
 edition       = "2024"
+rust-version  = "1.85"
 build         = "build.rs"
 description   = "Raw FFI bindings to Eclipse eCAL C API"
 license       = "Apache-2.0"
diff --git a/rustecal-types-bytes/Cargo.toml b/rustecal-types-bytes/Cargo.toml
index 5800952..12aa191 100644
--- a/rustecal-types-bytes/Cargo.toml
+++ b/rustecal-types-bytes/Cargo.toml
@@ -3,6 +3,7 @@ name          = "rustecal-types-bytes"
 version       = "0.1.7"
 authors       = ["Rex Schilasky"]
 edition       = "2024"
+rust-version  = "1.85"
 description   = "Vec<u8> type support for rustecal TypedPublisher/TypedSubscriber"
 license       = "Apache-2.0"
 repository    = "https://github.com/eclipse-ecal/rustecal"
diff --git a/rustecal-types-protobuf/Cargo.toml b/rustecal-types-protobuf/Cargo.toml
index 4e23358..dcab5c4 100644
--- a/rustecal-types-protobuf/Cargo.toml
+++ b/rustecal-types-protobuf/Cargo.toml
@@ -3,6 +3,7 @@ name          = "rustecal-types-protobuf"
 version       = "0.1.6"
 authors       = ["Rex Schilasky"]
 edition       = "2024"
+rust-version  = "1.85"
 description   = "Google Protobuf type support for rustecal TypedPublisher/TypedSubscriber"
 license       = "Apache-2.0"
 repository    = "https://github.com/eclipse-ecal/rustecal"
diff --git a/rustecal-types-serde/Cargo.toml b/rustecal-types-serde/Cargo.toml
index 3b38816..4838d1b 100644
--- a/rustecal-types-serde/Cargo.toml
+++ b/rustecal-types-serde/Cargo.toml
@@ -2,6 +2,7 @@
 name          = "rustecal-types-serde"
 version       = "0.1.5"
 edition       = "2024"
+rust-version  = "1.85"
 description   = "JSON/CBOR/MessagePack type support for rustecal TypedPublisher/TypedSubscriber"
 license       = "Apache-2.0"
 repository    = "https://github.com/eclipse-ecal/rustecal"
diff --git a/rustecal-types-string/Cargo.toml b/rustecal-types-string/Cargo.toml
index 631fdf4..3930c17 100644
--- a/rustecal-types-string/Cargo.toml
+++ b/rustecal-types-string/Cargo.toml
@@ -3,6 +3,7 @@ name          = "rustecal-types-string"
 version       = "0.1.5"
 authors       = ["Rex Schilasky"]
 edition       = "2024"
+rust-version  = "1.85"
 description   = "String type support for rustecal TypedPublisher/TypedSubscriber"
 license       = "Apache-2.0"
 repository    = "https://github.com/eclipse-ecal/rustecal"
diff --git a/rustecal/Cargo.toml b/rustecal/Cargo.toml
index 13e053c..ec272a2 100644
--- a/rustecal/Cargo.toml
+++ b/rustecal/Cargo.toml
@@ -2,6 +2,7 @@
 name          = "rustecal"
 version       = "0.1.8"
 edition       = "2024"
+rust-version  = "1.85"
 description   = "Meta-crate for rustecal: re-exports core, pubsub and service APIs"
 license       = "Apache-2.0"
 repository    = "https://github.com/eclipse-ecal/rustecal"