diff --git a/Cargo.lock b/Cargo.lock
index 0414dc59d..7b544f41f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -95,6 +95,11 @@ name = "base64"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "base64"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "bitflags"
 version = "1.2.1"
@@ -730,7 +735,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "maturin"
 version = "0.8.0-beta.1"
 dependencies = [
- "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytesize 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cargo_metadata 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "cbindgen 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1951,6 +1956,7 @@ dependencies = [
 "checksum backtrace 0.3.46 (registry+https://github.com/rust-lang/crates.io-index)" = "b1e692897359247cc6bb902933361652380af0f1b7651ae5c5013407f30e109e"
 "checksum backtrace-sys 0.1.35 (registry+https://github.com/rust-lang/crates.io-index)" = "7de8aba10a69c8e8d7622c5710229485ec32e9d55fdad160ea559c086fdcd118"
 "checksum base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b41b7ea54a0c9d92199de89e20e58d49f02f8e699814ef3fdf266f6f748d15c7"
+"checksum base64 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7d5ca2cd0adc3f48f9e9ea5a6bbdf9ccc0bfade884847e484d452414c7ccffb3"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 "checksum block-buffer 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
 "checksum block-cipher-trait 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1c924d49bd09e7c06003acda26cd9742e796e34282ec6c1189404dee0c1f4774"
diff --git a/Cargo.toml b/Cargo.toml
index 65e76540d..02c5fb66a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ name = "maturin"
 name = "maturin"
 
 [dependencies]
-base64 = "0.11.0"
+base64 = "0.12.0"
 bytesize = "1.0.0"
 cargo_metadata = "0.9.1"
 cbindgen = { version = "0.13.1", default-features = false }