diff --git a/zcash_primitives/Cargo.toml b/zcash_primitives/Cargo.toml
index b78b71e46..4a6cc82bb 100644
--- a/zcash_primitives/Cargo.toml
+++ b/zcash_primitives/Cargo.toml
@@ -96,7 +96,6 @@ orchard = { version = "0.4", default-features = false, features = ["test-depende
 
 [target.'cfg(unix)'.dev-dependencies]
 pprof = { version = "0.11", features = ["criterion", "flamegraph"] } # MSRV 1.56
-inferno = ">=0.11, <0.11.5" # MSRV 1.59
 
 [features]
 default = ["multicore"]
diff --git a/zcash_proofs/Cargo.toml b/zcash_proofs/Cargo.toml
index 87b3f188d..7675bac8b 100644
--- a/zcash_proofs/Cargo.toml
+++ b/zcash_proofs/Cargo.toml
@@ -45,7 +45,6 @@ rand_xorshift = "0.3"
 
 [target.'cfg(unix)'.dev-dependencies]
 pprof = { version = "0.11", features = ["criterion", "flamegraph"] } # MSRV 1.56
-inferno = ">=0.11, <0.11.5" # MSRV 1.59
 
 [features]
 default = ["local-prover", "multicore"]