diff --git a/pallas-blockfetch/Cargo.toml b/pallas-blockfetch/Cargo.toml
index a2d8b371..a69b5a7c 100644
--- a/pallas-blockfetch/Cargo.toml
+++ b/pallas-blockfetch/Cargo.toml
@@ -20,6 +20,6 @@ log = "0.4.14"
 
 [dev-dependencies]
 net2 = "0.2.37"
-env_logger = "0.9.0"
+env_logger = "0.10.0"
 pallas-handshake = { version = "0.3.0", path = "../pallas-handshake/" }
 hex = "0.4.3"
diff --git a/pallas-chainsync/Cargo.toml b/pallas-chainsync/Cargo.toml
index ad195992..ab4ca407 100644
--- a/pallas-chainsync/Cargo.toml
+++ b/pallas-chainsync/Cargo.toml
@@ -22,7 +22,7 @@ hex = "0.4.3"
 [dev-dependencies]
 net2 = "0.2.37"
 cryptoxide = "0.3.6"
-env_logger = "0.9.0"
+env_logger = "0.10.0"
 pallas-handshake = { version = "0.3.0", path = "../pallas-handshake/" }
 pallas-txsubmission = { version = "0.3.0", path = "../pallas-txsubmission/" }
 pallas-alonzo = { version = "0.3.0", path = "../pallas-alonzo/", features = ["crypto"] }
diff --git a/pallas-handshake/Cargo.toml b/pallas-handshake/Cargo.toml
index ebe1d611..735cd38b 100644
--- a/pallas-handshake/Cargo.toml
+++ b/pallas-handshake/Cargo.toml
@@ -21,4 +21,4 @@ log = "0.4.14"
 
 [dev-dependencies]
 net2 = "0.2.37"
-env_logger = "0.9.0"
+env_logger = "0.10.0"
diff --git a/pallas-localstate/Cargo.toml b/pallas-localstate/Cargo.toml
index c0b81ad7..845ca7e1 100644
--- a/pallas-localstate/Cargo.toml
+++ b/pallas-localstate/Cargo.toml
@@ -21,6 +21,6 @@ hex = "0.4.3"
 
 [dev-dependencies]
 net2 = "0.2.37"
-env_logger = "0.9.0"
+env_logger = "0.10.0"
 pallas-handshake = { path = "../pallas-handshake/" }
 pallas-txsubmission = { path = "../pallas-txsubmission/" }
diff --git a/pallas-multiplexer/Cargo.toml b/pallas-multiplexer/Cargo.toml
index 19555a3b..1ac981d7 100644
--- a/pallas-multiplexer/Cargo.toml
+++ b/pallas-multiplexer/Cargo.toml
@@ -19,4 +19,4 @@ hex = "0.4.3"
 
 [dev-dependencies]
 rand = "0.8.4"
-env_logger = "0.9.0"
+env_logger = "0.10.0"
diff --git a/pallas-txsubmission/Cargo.toml b/pallas-txsubmission/Cargo.toml
index 94d901a7..02aa4f77 100644
--- a/pallas-txsubmission/Cargo.toml
+++ b/pallas-txsubmission/Cargo.toml
@@ -22,5 +22,5 @@ itertools = "0.10.1"
 
 [dev-dependencies]
 net2 = "0.2.37"
-env_logger = "0.9.0"
+env_logger = "0.10.0"
 pallas-handshake = { path = "../pallas-handshake/" }