diff --git a/ci/docker-rust-nightly/Dockerfile b/ci/docker-rust-nightly/Dockerfile
index e4e48c6974..bfc61dfaba 100644
--- a/ci/docker-rust-nightly/Dockerfile
+++ b/ci/docker-rust-nightly/Dockerfile
@@ -1,4 +1,4 @@
-FROM solanalabs/rust:1.40.0
+FROM solanalabs/rust:1.41.0
 ARG date
 
 RUN set -x \
diff --git a/ci/docker-rust/Dockerfile b/ci/docker-rust/Dockerfile
index a303bc48f5..ad1937aef2 100644
--- a/ci/docker-rust/Dockerfile
+++ b/ci/docker-rust/Dockerfile
@@ -1,6 +1,6 @@
 # Note: when the rust version is changed also modify
 # ci/rust-version.sh to pick up the new image tag
-FROM rust:1.40.0
+FROM rust:1.41.0
 
 # Add Google Protocol Buffers for Libra's metrics library.
 ENV PROTOC_VERSION 3.8.0
diff --git a/ci/rust-version.sh b/ci/rust-version.sh
index 529ca142d7..e59b293ecb 100644
--- a/ci/rust-version.sh
+++ b/ci/rust-version.sh
@@ -16,13 +16,13 @@
 if [[ -n $RUST_STABLE_VERSION ]]; then
   stable_version="$RUST_STABLE_VERSION"
 else
-  stable_version=1.40.0
+  stable_version=1.41.0
 fi
 
 if [[ -n $RUST_NIGHTLY_VERSION ]]; then
   nightly_version="$RUST_NIGHTLY_VERSION"
 else
-  nightly_version=2019-12-19
+  nightly_version=2020-02-06
 fi
 
 
diff --git a/core/build.rs b/core/build.rs
deleted file mode 100644
index a2fbf3beff..0000000000
--- a/core/build.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-fn main() {
-    // Until https://github.com/rust-lang/rust/issues/44839 is resolved
-    // `#[target_feature(enable = "avx512f")]` is not available.
-    // Use an env flag instead:
-    if is_x86_feature_detected!("avx512f") {
-        println!("cargo:rustc-env=TARGET_FEATURE_AVX512F=1");
-    }
-}
diff --git a/core/src/validator.rs b/core/src/validator.rs
index 302603cfdd..48b129211e 100644
--- a/core/src/validator.rs
+++ b/core/src/validator.rs
@@ -659,16 +659,6 @@ fn report_target_features() {
             process::exit(1);
         }
     }
-
-    // TARGET_FEATURE_AVX512F is defined by build.rs
-    if option_env!("TARGET_FEATURE_AVX512F").is_some() {
-        if is_x86_feature_detected!("avx512f") {
-            info!("AVX512 detected");
-        } else {
-            error!("Your machine does not have AVX512 support, please rebuild from source on your machine");
-            process::exit(1);
-        }
-    }
 }
 
 // Get the activated stake percentage (based on the provided bank) that is visible in gossip
diff --git a/sdk/src/clock.rs b/sdk/src/clock.rs
index 275fb37333..22b36606c6 100644
--- a/sdk/src/clock.rs
+++ b/sdk/src/clock.rs
@@ -57,7 +57,7 @@ pub const MAX_TRANSACTION_FORWARDING_DELAY: usize = 6;
 
 /// Converts a slot to a storage segment. Does not indicate that a segment is complete.
 pub fn get_segment_from_slot(rooted_slot: Slot, slots_per_segment: u64) -> Segment {
-    ((rooted_slot + (slots_per_segment - 1)) / slots_per_segment)
+    (rooted_slot + (slots_per_segment - 1)) / slots_per_segment
 }
 
 /// Given a slot returns the latest complete segment, if no segment could possibly be complete
diff --git a/sdk/src/entrypoint.rs b/sdk/src/entrypoint.rs
index ab8c91e64b..4ddb6df7ed 100644
--- a/sdk/src/entrypoint.rs
+++ b/sdk/src/entrypoint.rs
@@ -71,7 +71,7 @@ pub unsafe fn deserialize<'a>(input: *mut u8) -> (&'a Pubkey, Vec<AccountInfo<'a
             let is_signer = {
                 #[allow(clippy::cast_ptr_alignment)]
                 let is_signer = *(input.add(offset) as *const u64);
-                (is_signer != 0)
+                is_signer != 0
             };
             offset += size_of::<u64>();
 
diff --git a/sdk/src/hash.rs b/sdk/src/hash.rs
index e1a86e5253..2f02a61be7 100644
--- a/sdk/src/hash.rs
+++ b/sdk/src/hash.rs
@@ -1,6 +1,5 @@
 //! The `hash` module provides functions for creating SHA-256 hashes.
 
-use bs58;
 use sha2::{Digest, Sha256};
 use std::convert::TryFrom;
 use std::fmt;
@@ -100,7 +99,6 @@ pub fn extend_and_hash(id: &Hash, val: &[u8]) -> Hash {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use bs58;
 
     #[test]
     fn test_hash_fromstr() {