diff --git a/core/Cargo.toml b/core/Cargo.toml
index dbc7584477e..33cba40dd8b 100644
--- a/core/Cargo.toml
+++ b/core/Cargo.toml
@@ -26,7 +26,7 @@ multistream-select = { version = "0.10", path = "../misc/multistream-select" }
 parking_lot = "0.11.0"
 pin-project = "1.0.0"
 prost = "0.7"
-rand = "0.7"
+rand = "0.8"
 rw-stream-sink = "0.2.0"
 sha2 = "0.9.1"
 smallvec = "1.6.1"
diff --git a/misc/multistream-select/Cargo.toml b/misc/multistream-select/Cargo.toml
index 7c86be9e6ac..7a54591d068 100644
--- a/misc/multistream-select/Cargo.toml
+++ b/misc/multistream-select/Cargo.toml
@@ -24,5 +24,5 @@ libp2p-core = { path = "../../core" }
 libp2p-mplex = { path = "../../muxers/mplex" }
 libp2p-plaintext = { path = "../../transports/plaintext" }
 quickcheck = "0.9.0"
-rand = "0.7.2"
+rand = "0.8.4"
 rw-stream-sink = "0.2.1"
diff --git a/muxers/mplex/Cargo.toml b/muxers/mplex/Cargo.toml
index ae668ac92d4..150835deff9 100644
--- a/muxers/mplex/Cargo.toml
+++ b/muxers/mplex/Cargo.toml
@@ -17,7 +17,7 @@ libp2p-core = { version = "0.29.0", path = "../../core" }
 log = "0.4"
 nohash-hasher = "0.2"
 parking_lot = "0.11"
-rand = "0.7"
+rand = "0.8"
 smallvec = "1.6.1"
 unsigned-varint = { version = "0.7", features = ["asynchronous_codec"] }
 
@@ -29,7 +29,7 @@ futures = "0.3"
 libp2p-tcp = { path = "../../transports/tcp" }
 libp2p-plaintext = { path = "../../transports/plaintext" }
 quickcheck = "0.9"
-rand = "0.7"
+rand = "0.8"
 
 [[bench]]
 name = "split_send_size"
diff --git a/protocols/floodsub/Cargo.toml b/protocols/floodsub/Cargo.toml
index 2ff1677461e..865676ee518 100644
--- a/protocols/floodsub/Cargo.toml
+++ b/protocols/floodsub/Cargo.toml
@@ -17,7 +17,7 @@ libp2p-core = { version = "0.29.0", path = "../../core" }
 libp2p-swarm = { version = "0.30.0", path = "../../swarm" }
 log = "0.4"
 prost = "0.7"
-rand = "0.7"
+rand = "0.8"
 smallvec = "1.6.1"
 
 [build-dependencies]
diff --git a/protocols/gossipsub/Cargo.toml b/protocols/gossipsub/Cargo.toml
index a4845f06580..8b788ca2d2f 100644
--- a/protocols/gossipsub/Cargo.toml
+++ b/protocols/gossipsub/Cargo.toml
@@ -16,7 +16,7 @@ bytes = "1.0"
 byteorder = "1.3.4"
 fnv = "1.0.7"
 futures = "0.3.5"
-rand = "0.7.3"
+rand = "0.8.4"
 asynchronous-codec = "0.6"
 wasm-timer = "0.2.4"
 unsigned-varint = { version = "0.7.0", features = ["asynchronous_codec"] }
diff --git a/protocols/kad/Cargo.toml b/protocols/kad/Cargo.toml
index 5e45a80ed64..05badf8e787 100644
--- a/protocols/kad/Cargo.toml
+++ b/protocols/kad/Cargo.toml
@@ -20,7 +20,7 @@ log = "0.4"
 libp2p-core = { version = "0.29.0", path = "../../core" }
 libp2p-swarm = { version = "0.30.0", path = "../../swarm" }
 prost = "0.7"
-rand = "0.7.2"
+rand = "0.8.4"
 sha2 = "0.9.1"
 smallvec = "1.6.1"
 wasm-timer = "0.2"
diff --git a/protocols/ping/Cargo.toml b/protocols/ping/Cargo.toml
index 6062574b172..2776101db37 100644
--- a/protocols/ping/Cargo.toml
+++ b/protocols/ping/Cargo.toml
@@ -14,7 +14,7 @@ futures = "0.3.1"
 libp2p-core = { version = "0.29.0", path = "../../core" }
 libp2p-swarm = { version = "0.30.0", path = "../../swarm" }
 log = "0.4.1"
-rand = "0.7.2"
+rand = "0.8.4"
 void = "1.0"
 wasm-timer = "0.2"
 
diff --git a/protocols/relay/Cargo.toml b/protocols/relay/Cargo.toml
index 27c68fc2c88..b3bf61a8fe8 100644
--- a/protocols/relay/Cargo.toml
+++ b/protocols/relay/Cargo.toml
@@ -19,7 +19,7 @@ libp2p-swarm = { version = "0.30", path = "../../swarm" }
 log = "0.4"
 pin-project = "1"
 prost = "0.7"
-rand = "0.7"
+rand = "0.8"
 smallvec = "1.6.1"
 unsigned-varint = { version = "0.7", features = ["asynchronous_codec"] }
 void = "1"
diff --git a/protocols/request-response/Cargo.toml b/protocols/request-response/Cargo.toml
index 577f8f72b9c..c001cbf9623 100644
--- a/protocols/request-response/Cargo.toml
+++ b/protocols/request-response/Cargo.toml
@@ -18,7 +18,7 @@ libp2p-swarm = { version = "0.30.0", path = "../../swarm" }
 log = "0.4.11"
 lru = "0.6"
 minicbor = { version = "0.8", features = ["std", "derive"] }
-rand = "0.7"
+rand = "0.8"
 smallvec = "1.6.1"
 unsigned-varint = { version = "0.7", features = ["std", "futures"] }
 wasm-timer = "0.2"
@@ -28,4 +28,4 @@ async-std = "1.6.2"
 libp2p-noise = { path = "../../transports/noise" }
 libp2p-tcp = { path = "../../transports/tcp" }
 libp2p-yamux = { path = "../../muxers/yamux" }
-rand = "0.7"
+rand = "0.8"
diff --git a/swarm/Cargo.toml b/swarm/Cargo.toml
index 90865fce530..43b5943b5d9 100644
--- a/swarm/Cargo.toml
+++ b/swarm/Cargo.toml
@@ -14,7 +14,7 @@ either = "1.6.0"
 futures = "0.3.1"
 libp2p-core = { version = "0.29.0", path = "../core" }
 log = "0.4"
-rand = "0.7"
+rand = "0.8"
 smallvec = "1.6.1"
 wasm-timer = "0.2"
 void = "1"
@@ -23,4 +23,4 @@ void = "1"
 libp2p-mplex = { path = "../muxers/mplex" }
 libp2p-noise = { path = "../transports/noise" }
 quickcheck = "0.9.0"
-rand = "0.7.2"
+rand = "0.8.4"
diff --git a/transports/deflate/Cargo.toml b/transports/deflate/Cargo.toml
index 6c43b792e1d..68626192e82 100644
--- a/transports/deflate/Cargo.toml
+++ b/transports/deflate/Cargo.toml
@@ -18,4 +18,4 @@ flate2 = "1.0"
 async-std = "1.6.2"
 libp2p-tcp = { path = "../../transports/tcp" }
 quickcheck = "0.9"
-rand = "0.7"
+rand = "0.8"
diff --git a/transports/plaintext/Cargo.toml b/transports/plaintext/Cargo.toml
index 3ef638e4b31..269457d7a5c 100644
--- a/transports/plaintext/Cargo.toml
+++ b/transports/plaintext/Cargo.toml
@@ -22,7 +22,7 @@ void = "1.0.2"
 [dev-dependencies]
 env_logger = "0.8.1"
 quickcheck = "0.9.0"
-rand = "0.7"
+rand = "0.8"
 
 [build-dependencies]
 prost-build = "0.7"
diff --git a/transports/pnet/Cargo.toml b/transports/pnet/Cargo.toml
index 3ed9acfba31..59924450173 100644
--- a/transports/pnet/Cargo.toml
+++ b/transports/pnet/Cargo.toml
@@ -14,7 +14,7 @@ futures = "0.3.1"
 log = "0.4.8"
 salsa20 = "0.8"
 sha3 = "0.9"
-rand = "0.7"
+rand = "0.8"
 pin-project = "1.0.2"
 
 [dev-dependencies]