diff --git a/crates/cli/Cargo.toml b/crates/cli/Cargo.toml
index 6524d496..37a88df8 100644
--- a/crates/cli/Cargo.toml
+++ b/crates/cli/Cargo.toml
@@ -15,7 +15,7 @@ information see https://github.com/alexcrichton/wasm-bindgen.
 [dependencies]
 curl = "0.4.13"
 docopt = "1.0"
-env_logger = "0.5"
+env_logger = "0.6"
 failure = "0.1.2"
 log = "0.4"
 parity-wasm = "0.35"
diff --git a/crates/web-sys/Cargo.toml b/crates/web-sys/Cargo.toml
index 733c4eea..6aa987fd 100644
--- a/crates/web-sys/Cargo.toml
+++ b/crates/web-sys/Cargo.toml
@@ -19,7 +19,7 @@ doctest = false
 test = false
 
 [build-dependencies]
-env_logger = "0.5.10"
+env_logger = "0.6.0"
 failure = "0.1.2"
 wasm-bindgen-webidl = { path = "../webidl", version = "=0.2.21" }
 sourcefile = "0.1"
diff --git a/crates/webidl-tests/Cargo.toml b/crates/webidl-tests/Cargo.toml
index e8c022c8..600f8a17 100644
--- a/crates/webidl-tests/Cargo.toml
+++ b/crates/webidl-tests/Cargo.toml
@@ -10,7 +10,7 @@ path = 'lib.rs'
 
 [build-dependencies]
 wasm-bindgen-webidl = { path = '../webidl' }
-env_logger = "0.5"
+env_logger = "0.6"
 
 [dev-dependencies]
 js-sys = { path = '../js-sys' }