diff --git a/.circleci/config.yml b/.circleci/config.yml
index ec28cdfb..b589018d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,13 +1,5 @@
 version: 2
 jobs:
-  macOS_swift_4.1:
-    macos:
-      xcode: "9.3.0"
-    steps:
-      - checkout
-      - run: swift build
-      - run: swift test
-      - run: make build
   macOS_swift_4.2:
     macos:
       xcode: "10.0.0"
@@ -19,5 +11,4 @@ workflows:
   version: 2
   workflow:
     jobs:
-      - macOS_swift_4.1
       - macOS_swift_4.2