diff --git a/Cargo.toml b/Cargo.toml
index f10303837..49ec929d1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,6 @@ log = { version = "0.4.4", default-features = false, optional = true }
 libc = { version = "0.2.18", optional = true }
 bitflags = { version = "1.0", default-features = false }
 defmt = { version = "0.3", optional = true }
-rand_core = { version = "0.6.3", optional = true, default-features = false }
 
 [dev-dependencies]
 env_logger = "0.9"
@@ -31,7 +30,7 @@ rand = "0.8"
 url = "2.0"
 
 [features]
-std = ["managed/std", "rand_core/std"]
+std = ["managed/std"]
 alloc = ["managed/alloc"]
 verbose = []
 "medium-ethernet" = ["socket"]