diff --git a/Cargo.lock b/Cargo.lock
index 4a0194a4..e6b822e8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -579,7 +579,7 @@ dependencies = [
  "der",
  "elliptic-curve",
  "rfc6979",
- "signature",
+ "signature 1.6.4",
 ]
 
 [[package]]
@@ -588,7 +588,7 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "07dfc993ea376e864fe29a4099a61ca0bb994c6d7745a61bf60ddb3d64e05237"
 dependencies = [
- "signature",
+ "signature 1.6.4",
 ]
 
 [[package]]
@@ -2140,6 +2140,12 @@ dependencies = [
  "rand_core 0.6.2",
 ]
 
+[[package]]
+name = "signature"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fe458c98333f9c8152221191a77e2a44e8325d0193484af2e9421a53019e57d"
+
 [[package]]
 name = "slab"
 version = "0.4.2"
@@ -2431,7 +2437,7 @@ dependencies = [
  "generic-array",
  "p256",
  "rand 0.7.3",
- "signature",
+ "signature 2.0.0",
  "tink-core",
  "tink-proto",
 ]
diff --git a/signature/Cargo.toml b/signature/Cargo.toml
index b0e1253e..4d8b24d7 100644
--- a/signature/Cargo.toml
+++ b/signature/Cargo.toml
@@ -17,6 +17,6 @@ ed25519-dalek = "^1.0.1"
 generic-array = "^0.14.6"
 p256 = "^0.11.1"
 rand = "^0.7"
-signature = "^1.6"
+signature = "^2.0"
 tink-core = "^0.2"
 tink-proto = "^0.2"