diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7e23b8cf..6b4b9417 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -9,7 +9,6 @@ jobs:
       - image: rust:<< parameters.image >>
     environment:
       RUST_BACKTRACE: 1
-      RUSTFLAGS: -D warnings
     steps:
       - checkout
       - restore_cache:
@@ -37,7 +36,6 @@ jobs:
       xcode: "9.0"
     environment:
       RUST_BACKTRACE: 1
-      RUSTFLAGS: -D warnings
     steps:
       - checkout
       - run: curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain << parameters.version >>
@@ -63,6 +61,6 @@ workflows:
     jobs:
       - linux:
           name: openssl
-          image: 1.32.0-stretch
+          image: 1.37.0-stretch
       - macos:
-          version: 1.32.0
+          version: 1.37.0
diff --git a/Cargo.toml b/Cargo.toml
index fc43d89c..26bd2030 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,8 +11,8 @@ readme = "README.md"
 vendored = ["openssl/vendored"]
 
 [target.'cfg(any(target_os = "macos", target_os = "ios"))'.dependencies]
-security-framework = "0.3.1"
-security-framework-sys = "0.3.1"
+security-framework = "0.4.1"
+security-framework-sys = "0.4.1"
 lazy_static = "1.0"
 libc = "0.2"
 tempfile = "3.0"