diff --git a/Cargo.toml b/Cargo.toml
index 3c416e497..395f35e31 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -31,7 +31,7 @@ test = true
 num-integer = "0.1.39"
 num-traits = "0.2"
 num-complex = "0.2"
-itertools = { version = "0.7.0", default-features = false }
+itertools = { version = "0.8.0", default-features = false }
 
 rayon = { version = "1.0.3", optional = true }
 
@@ -45,9 +45,9 @@ serde = { version = "1.0", optional = true }
 
 [dev-dependencies]
 defmac = "0.2"
-quickcheck = { version = "0.7.2", default-features = false }
+quickcheck = { version = "0.8", default-features = false }
 rawpointer = "0.1"
-itertools = { version = "0.7.0", default-features = false, features = ["use_std"] }
+itertools = { version = "0.8.0", default-features = false, features = ["use_std"] }
 approx = "0.3"
 
 [features]
diff --git a/blas-tests/Cargo.toml b/blas-tests/Cargo.toml
index f200ddb66..055d83f52 100644
--- a/blas-tests/Cargo.toml
+++ b/blas-tests/Cargo.toml
@@ -11,6 +11,6 @@ test = false
 ndarray = { path = "../", features = ["blas"] }
 blas-src = { version = "0.2.0", default-features = false, features = ["openblas"] }
 openblas-src = { version = "0.6.0", default-features = false, features = ["cblas", "system"] }
-defmac = "0.1"
+defmac = "0.2"
 num-traits = "0.2"
 
diff --git a/parallel/Cargo.toml b/parallel/Cargo.toml
index 45acdd946..9eb8e231e 100644
--- a/parallel/Cargo.toml
+++ b/parallel/Cargo.toml
@@ -18,7 +18,7 @@ ndarray = { version = "0.12.0", path = "../" }
 
 [dev-dependencies]
 num_cpus = "1.2"
-itertools = { version = "0.7.0", default-features = false }
+itertools = { version = "0.8.0", default-features = false }
 
 [package.metadata.release]
 no-dev-version = true