diff --git a/.cci.jenkinsfile b/.cci.jenkinsfile
index 1a760710..c611fccf 100644
--- a/.cci.jenkinsfile
+++ b/.cci.jenkinsfile
@@ -1,4 +1,4 @@
-// Documentation: https://github.com/coreos/coreos-ci/blob/master/README-upstream-ci.md
+// Documentation: https://github.com/coreos/coreos-ci/blob/main/README-upstream-ci.md
 
 stage("Build") {
 parallel rpms: {
diff --git a/docs/CONTRIBUTING.md b/docs/CONTRIBUTING.md
index a1746da5..9b6435e7 100644
--- a/docs/CONTRIBUTING.md
+++ b/docs/CONTRIBUTING.md
@@ -25,4 +25,4 @@ See the [OSTree CONTRIBUTING][contributing] coding style.
 
 [rpm-ostree]: https://github.com/coreos/rpm-ostree
 [jenkinsfile]: https://github.com/coreos/rpm-ostree/blob/main/.cci.jenkinsfile
-[contributing]: https://github.com/ostreedev/ostree/blob/master/docs/CONTRIBUTING.md
+[contributing]: https://github.com/ostreedev/ostree/blob/main/docs/CONTRIBUTING.md
diff --git a/docs/administrator-handbook.md b/docs/administrator-handbook.md
index 4f1d276b..c1aa195f 100644
--- a/docs/administrator-handbook.md
+++ b/docs/administrator-handbook.md
@@ -59,7 +59,7 @@ getting exactly what you asked for.
 It is possible to dynamically add more packages onto the system that are not
 part of the commit composed on the server. These additional "layered" packages
 are persistent across upgrades, rebases, and deploys (contrast with the
-ostree [unlocking](https://github.com/ostreedev/ostree/blob/master/man/ostree-admin-unlock.xml) mechanism).
+ostree [unlocking](https://github.com/ostreedev/ostree/blob/main/man/ostree-admin-unlock.xml) mechanism).
 
 This is where the true hybrid image/package nature of rpm-ostree comes into
 play; you get a combination of the benefits of images and packages.  The
diff --git a/tests/common/libtest.cxx b/tests/common/libtest.cxx
index 1a0e25af..f36c9463 100644
--- a/tests/common/libtest.cxx
+++ b/tests/common/libtest.cxx
@@ -23,7 +23,7 @@
 #include "libtest.h"
 
 /* Copied and adapted from:
- * https://github.com/ostreedev/ostree/blob/master/tests/libostreetest.c
+ * https://github.com/ostreedev/ostree/blob/main/tests/libostreetest.c
  *
  * This function hovers in a quantum superposition of horrifying and
  * beautiful.  Future generations may interpret it as modern art.
diff --git a/tests/common/libtest.h b/tests/common/libtest.h
index 22f0441b..909ee1a1 100644
--- a/tests/common/libtest.h
+++ b/tests/common/libtest.h
@@ -21,7 +21,7 @@
  */
 
 /* Copied and adapted from:
- * https://github.com/ostreedev/ostree/blob/master/tests/libostreetest.c
+ * https://github.com/ostreedev/ostree/blob/main/tests/libostreetest.c
  */
 
 #pragma once