diff --git a/rinex-cli/Cargo.toml b/rinex-cli/Cargo.toml
index 32ff51ef9..2957fdc68 100644
--- a/rinex-cli/Cargo.toml
+++ b/rinex-cli/Cargo.toml
@@ -41,6 +41,6 @@ plotly =  "0.8.4"
 # plotly = { git = "https://github.com/gwbres/plotly", branch = "density-mapbox" }
 
 # solver
-gnss-rtk = { version = "0.3.1", features = ["serde"] }
+gnss-rtk = { version = "0.4.0", features = ["serde"] }
 # gnss-rtk = { git = "https://github.com/rtk-rs/gnss-rtk", branch = "develop", features = ["serde"] }
 # gnss-rtk = { path = "../../rtk-rs/gnss-rtk", features = ["serde"] }
diff --git a/rnx2cggtts/Cargo.toml b/rnx2cggtts/Cargo.toml
index f172a7c50..7965389b9 100644
--- a/rnx2cggtts/Cargo.toml
+++ b/rnx2cggtts/Cargo.toml
@@ -31,6 +31,6 @@ cggtts = { version = "4.0.1", features = ["serde", "scheduler"] }
 # cggtts = { path = "../../cggtts/cggtts", features = ["serde", "scheduler"] }
 
 # solver
-gnss-rtk = { version = "0.3.1", features = ["serde"] }
+gnss-rtk = { version = "0.4.0", features = ["serde"] }
 # gnss-rtk = { git = "https://github.com/rtk-rs/gnss-rtk", branch = "develop", features = ["serde"] }
 # gnss-rtk = { path = "../../rtk-rs/gnss-rtk", features = ["serde"] }