diff --git a/Dockerfile b/Dockerfile
index 7294b4e..0740831 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,8 @@
 
 FROM rust:slim
 RUN set -e -x; \
+    rustup toolchain install nightly-2022-01-14; \
+    rustup default nightly-2022-01-14; \
     rustup component add llvm-tools-preview; \
     cargo install cargo-llvm-cov