diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 79ae30db..f79383f8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,7 +4,7 @@ on:
   push:
     branches: ["**"]
   pull_request:
-    branches: [master]
+    branches: [main]
   workflow_dispatch:
 
 jobs:
@@ -80,7 +80,7 @@ jobs:
       - name: Checkout Parent Repo
         uses: actions/checkout@v2
         with:
-          ref: master
+          ref: main
           repository: aws/aws-iot-device-sdk-embedded-C
       - run: rm -r libraries/standard/coreHTTP
       - name: Clone This Repo
@@ -141,7 +141,7 @@ jobs:
       - name: Checkout coreMQTT
         uses: actions/checkout@v2
         with:
-          ref: master
+          ref: main
           repository: FreeRTOS/coreMQTT
           path: ssot
       - name: Check transport_interface.h
diff --git a/MISRA.md b/MISRA.md
index 0d614cce..981f066f 100644
--- a/MISRA.md
+++ b/MISRA.md
@@ -5,7 +5,7 @@ guidelines, with some noted exceptions. Compliance is checked with Coverity stat
 Deviations from the MISRA standard are listed below. The deviations below do not
 include the third-party [http-parser source code](https://github.com/nodejs/http-parser/tree/v2.9.3):
 
-### Ignored by [Coverity Configuration](https://github.com/aws/aws-iot-device-sdk-embedded-C/blob/master/tools/coverity/misra.config)
+### Ignored by [Coverity Configuration](https://github.com/aws/aws-iot-device-sdk-embedded-C/blob/main/tools/coverity/misra.config)
 | Deviation | Category | Justification |
 | :-: | :-: | :-- |
 | Directive 4.5 | Advisory | Allow names that MISRA considers ambiguous (such as LogInfo and LogError). |
diff --git a/README.md b/README.md
index c8bb2e2d..be0c5fec 100644
--- a/README.md
+++ b/README.md
@@ -77,7 +77,7 @@ file, refer to the `coverity_analysis` library target in
 ## Reference examples
 
 The AWS IoT Device SDK for Embedded C repository contains demos of using the HTTP client
-library [here](https://github.com/aws/aws-iot-device-sdk-embedded-C/tree/master/demos/http)
+library [here](https://github.com/aws/aws-iot-device-sdk-embedded-C/tree/main/demos/http)
 on a POSIX platform. These can be used as reference examples for the library API.
 
 ## Generating documentation
diff --git a/source/include/core_http_config_defaults.h b/source/include/core_http_config_defaults.h
index 7541597e..578f87e6 100644
--- a/source/include/core_http_config_defaults.h
+++ b/source/include/core_http_config_defaults.h
@@ -75,7 +75,7 @@
  * double parentheses to be ISO C89/C90 standard compliant. For a reference
  * POSIX implementation of the logging macros, refer to core_http_config.h files, and the
  * logging-stack in demos folder of the
- * [AWS IoT Embedded C SDK repository](https://github.com/aws/aws-iot-device-sdk-embedded-C/tree/master).
+ * [AWS IoT Embedded C SDK repository](https://github.com/aws/aws-iot-device-sdk-embedded-C).
  *
  * <b>Default value</b>: Error logging is turned off, and no code is generated for calls
  * to the macro in the HTTP Client library on compilation.
@@ -95,7 +95,7 @@
  * double parentheses to be ISO C89/C90 standard compliant. For a reference
  * POSIX implementation of the logging macros, refer to core_http_config.h files, and the
  * logging-stack in demos folder of the
- * [AWS IoT Embedded C SDK repository](https://github.com/aws/aws-iot-device-sdk-embedded-C/tree/master).
+ * [AWS IoT Embedded C SDK repository](https://github.com/aws/aws-iot-device-sdk-embedded-C).
  *
  * <b>Default value</b>: Warning logs are turned off, and no code is generated for calls
  * to the macro in the HTTP Client library on compilation.
@@ -115,7 +115,7 @@
  * double parentheses to be ISO C89/C90 standard compliant. For a reference
  * POSIX implementation of the logging macros, refer to core_http_config.h files, and the
  * logging-stack in demos folder of the
- * [AWS IoT Embedded C SDK repository](https://github.com/aws/aws-iot-device-sdk-embedded-C/tree/master).
+ * [AWS IoT Embedded C SDK repository](https://github.com/aws/aws-iot-device-sdk-embedded-C).
  *
  * <b>Default value</b>: Info logging is turned off, and no code is generated for calls
  * to the macro in the HTTP Client library on compilation.
@@ -135,7 +135,7 @@
  * double parentheses to be ISO C89/C90 standard compliant. For a reference
  * POSIX implementation of the logging macros, refer to core_http_config.h files, and the
  * logging-stack in demos folder of the
- * [AWS IoT Embedded C SDK repository](https://github.com/aws/aws-iot-device-sdk-embedded-C/tree/master).
+ * [AWS IoT Embedded C SDK repository](https://github.com/aws/aws-iot-device-sdk-embedded-C).
  *
  * <b>Default value</b>: Debug logging is turned off, and no code is generated for calls
  * to the macro in the HTTP Client library on compilation.