diff --git a/bitcoin/Cargo.toml b/bitcoin/Cargo.toml
index e8717845..41110419 100644
--- a/bitcoin/Cargo.toml
+++ b/bitcoin/Cargo.toml
@@ -42,12 +42,12 @@ core2 = { version = "0.3.0", optional = true, default-features = false }
 base64 = { version = "0.13.0", optional = true }
 bitcoinconsensus = { version = "0.20.2-0.5.0", optional = true }
 # Do NOT use this as a feature! Use the `serde` feature instead.
-actual-serde = { package = "serde", version = "1", default-features = false, features = [ "derive", "alloc" ], optional = true }
+actual-serde = { package = "serde", version = "1.0.103", default-features = false, features = [ "derive", "alloc" ], optional = true }
 hashbrown = { version = "0.8", optional = true }
 
 [dev-dependencies]
-serde_json = "<1.0.45"
-serde_test = "1"
+serde_json = "1.0.0"
+serde_test = "1.0.19"
 secp256k1 = { version = "0.24.0", features = [ "recovery", "rand-std" ] }
 bincode = "1.3.1"