diff --git a/.circleci/config.yml b/.circleci/config.yml
index 67edfa7e..0a0538d6 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -101,7 +101,6 @@ jobs:
       - run: cd rust && rustup component add rustfmt
       - run: cd rust && rustup component add clippy
       - run: cd rust && cargo fetch
-      - run: cd rust && rustc +stable --version
       - run: cd rust && rustc +$(cat rust-toolchain) --version
       - persist_to_workspace:
           root: "."
diff --git a/rust/rust-toolchain b/rust/rust-toolchain
index 10a652fd..3987c472 100644
--- a/rust/rust-toolchain
+++ b/rust/rust-toolchain
@@ -1 +1 @@
-nightly-2020-03-19
+1.43.1
diff --git a/rust/src/proofs/api.rs b/rust/src/proofs/api.rs
index 474d3e05..7acbd8b0 100644
--- a/rust/src/proofs/api.rs
+++ b/rust/src/proofs/api.rs
@@ -1526,7 +1526,6 @@ pub mod tests {
             let mut buf_b = Vec::with_capacity(2032);
             let mut f = std::fs::File::open(unseal_path)?;
 
-            #[allow(clippy::verbose_file_reads)]
             let _ = f.read_to_end(&mut buf_b)?;
 
             let piece_a_len = (*resp_a1).total_write_unpadded as usize;