diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 48f3b04..1c08037 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -71,14 +71,14 @@ jobs:
         args: --features "serde"
 
   msrv:
-    name: Current MSRV is 1.41
+    name: Current MSRV is 1.51
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: 1.41
+        toolchain: 1.51
         override: true
     - uses: actions-rs/cargo@v1
       with:
diff --git a/Cargo.toml b/Cargo.toml
index 3a3f1a4..ad12ff9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -39,7 +39,7 @@ rand_core = { version = "0.6", default-features = false }
 # `serde` is renamed to `our_serde` in order to avoid a name collision between
 # importing the serde dependency and enabling the curve25519-dalek/serde feature
 our_serde = { package = "serde", version = "1", default-features = false, optional = true, features = ["derive"] }
-zeroize = { version = "=1.3", default-features = false, features = ["zeroize_derive"] }
+zeroize = { version = "1", default-features = false, features = ["zeroize_derive"] }
 
 [dev-dependencies]
 bincode = "1"
diff --git a/README.md b/README.md
index ca6a43a..c2c6fb6 100644
--- a/README.md
+++ b/README.md
@@ -107,7 +107,7 @@ x25519-dalek = "2.0.0-pre.0"
 
 # MSRV
 
-Current MSRV is 1.41 for production builds, and 1.48 for running tests.
+Current MSRV is 1.51.
 
 # Documentation