diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8ec9caeb..34ae9b95 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust: [ 1.64.0, beta, nightly ]
+        rust: [ 1.70.0, beta, nightly ]
 
     runs-on: ubuntu-latest
 
diff --git a/.travis.sh b/.travis.sh
index 5f1c83f7..7be35eef 100755
--- a/.travis.sh
+++ b/.travis.sh
@@ -15,7 +15,7 @@ then
     cargo build -p cargo-dinghy
     CARGO_DINGHY="`pwd`/target/debug/cargo-dinghy -vv"
 fi
-echo RUST_VERSION: ${RUST_VERSION:=1.64.0}
+echo RUST_VERSION: ${RUST_VERSION:=1.70.0}
 
 rustup toolchain add $RUST_VERSION
 export RUSTUP_TOOLCHAIN=$RUST_VERSION
diff --git a/README.md b/README.md
index 99792f0a..3d5d9b3e 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Dinghy
 
-![rustc >= 1.64.0](https://img.shields.io/badge/rustc-%3E%3D1.64.0-brightgreen)
+![rustc >= 1.70.0](https://img.shields.io/badge/rustc-%3E%3D1.70.0-brightgreen)
 ![MIT/Apache 2](https://img.shields.io/crates/l/dinghy)
 ![Build and test](https://github.com/snipsco/dinghy/workflows/Build%20and%20test/badge.svg)