diff --git a/README.md b/README.md
index b6e6c3d..52bb3a7 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@ initialized with niv and nixpkgs:
     "nixpkgs": {
         "url": "https://github.com/NixOS/nixpkgs-channels/archive/109a28ab954a0ad129f7621d468f829981b8b96c.tar.gz",
         "owner": "NixOS",
-        "branch": "nixos-19.03",
+        "branch": "nixos-19.09",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz",
         "repo": "nixpkgs-channels",
         "sha256": "12wnxla7ld4cgpdndaipdh3j4zdalifk287ihxhnmrzrghjahs3q",
@@ -133,7 +133,7 @@ import sources.nixpkgs                  # and use them again!
 #### Tracking a nixpkgs branch
 
 The `init` command sets the `nix/sources.json` file to track the latest commit
-present on nixpkgs 19.03 when the command was run. Run the following command to
+present on nixpkgs 19.09 when the command was run. Run the following command to
 update it:
 
 ``` shell
@@ -143,7 +143,7 @@ $ niv update nixpkgs
 To change the branch being tracked run this command:
 
 ``` shell
-$ niv update nixpkgs -b nixos-19.03     # equivalent to --branch nixos-19.03
+$ niv update nixpkgs -b nixos-19.09     # equivalent to --branch nixos-19.09
 ```
 
 #### Importing packages from GitHub
@@ -224,7 +224,7 @@ Available commands:
 Examples:
 
   niv add stedolan/jq
-  niv add NixOS/nixpkgs-channels -n nixpkgs -b nixos-19.03
+  niv add NixOS/nixpkgs-channels -n nixpkgs -b nixos-19.09
   niv add my-package -v alpha-0.1 -t http://example.com/archive/<version>.zip
 
 Usage: niv add PACKAGE [-n|--name NAME] ([-a|--attribute KEY=VAL] |
diff --git a/README.tpl.md b/README.tpl.md
index 6351b73..a43d3ec 100644
--- a/README.tpl.md
+++ b/README.tpl.md
@@ -96,7 +96,7 @@ initialized with niv and nixpkgs:
     "nixpkgs": {
         "url": "https://github.com/NixOS/nixpkgs-channels/archive/109a28ab954a0ad129f7621d468f829981b8b96c.tar.gz",
         "owner": "NixOS",
-        "branch": "nixos-19.03",
+        "branch": "nixos-19.09",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz",
         "repo": "nixpkgs-channels",
         "sha256": "12wnxla7ld4cgpdndaipdh3j4zdalifk287ihxhnmrzrghjahs3q",
@@ -133,7 +133,7 @@ import sources.nixpkgs                  # and use them again!
 #### Tracking a nixpkgs branch
 
 The `init` command sets the `nix/sources.json` file to track the latest commit
-present on nixpkgs 19.03 when the command was run. Run the following command to
+present on nixpkgs 19.09 when the command was run. Run the following command to
 update it:
 
 ``` shell
@@ -143,7 +143,7 @@ $ niv update nixpkgs
 To change the branch being tracked run this command:
 
 ``` shell
-$ niv update nixpkgs -b nixos-19.03     # equivalent to --branch nixos-19.03
+$ niv update nixpkgs -b nixos-19.09     # equivalent to --branch nixos-19.09
 ```
 
 #### Importing packages from GitHub
diff --git a/nix/sources.json b/nix/sources.json
index 2247067..c91a444 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -1,6 +1,6 @@
 {
     "nixpkgs": {
-        "branch": "nixos-19.03",
+        "branch": "nixos-19.09",
         "description": "Nixpkgs/NixOS branches that track the Nixpkgs/NixOS channels",
         "homepage": "https://github.com/NixOS/nixpkgs",
         "owner": "NixOS",
diff --git a/src/Niv/Cli.hs b/src/Niv/Cli.hs
index 2eaf622..aa1aeeb 100644
--- a/src/Niv/Cli.hs
+++ b/src/Niv/Cli.hs
@@ -125,7 +125,7 @@ cmdInit = do
         , ( pathNixSourcesJson fsj
           , \path -> do
               createFile path initNixSourcesJsonContent
-              -- Imports @niv@ and @nixpkgs@ (19.03)
+              -- Imports @niv@ and @nixpkgs@ (19.09)
               say "Importing 'niv' ..."
               cmdAdd (updateCmd githubCmd) (PackageName "niv")
                 (specToFreeAttrs $ PackageSpec $ HMS.fromList
@@ -138,7 +138,7 @@ cmdInit = do
                 (specToFreeAttrs $ PackageSpec $ HMS.fromList
                   [ "owner" .= ("NixOS" :: T.Text)
                   , "repo" .= ("nixpkgs-channels" :: T.Text)
-                  , "branch" .= ("nixos-19.03" :: T.Text)
+                  , "branch" .= ("nixos-19.09" :: T.Text)
                   ]
                 )
           , \path _content -> dontCreateFile path)
diff --git a/src/Niv/GitHub/Cmd.hs b/src/Niv/GitHub/Cmd.hs
index c5b9fbf..f7fddcb 100644
--- a/src/Niv/GitHub/Cmd.hs
+++ b/src/Niv/GitHub/Cmd.hs
@@ -109,7 +109,7 @@ describeGitHub = mconcat
       "Examples:" Opts.<$$>
       "" Opts.<$$>
       "  niv add stedolan/jq" Opts.<$$>
-      "  niv add NixOS/nixpkgs-channels -n nixpkgs -b nixos-19.03" Opts.<$$>
+      "  niv add NixOS/nixpkgs-channels -n nixpkgs -b nixos-19.09" Opts.<$$>
       "  niv add my-package -v alpha-0.1 -t http://example.com/archive/<version>.zip"
   ]
 
diff --git a/tests/github/default.nix b/tests/github/default.nix
index 18a958e..755b2fd 100644
--- a/tests/github/default.nix
+++ b/tests/github/default.nix
@@ -71,7 +71,7 @@ pkgs.runCommand "test"
     mkdir -p mock/repos/NixOS/nixpkgs-channels
     cp  ${./data/repos/NixOS/nixpkgs-channels/repository.json} mock/repos/NixOS/nixpkgs-channels/index.html
     mkdir -p mock/repos/NixOS/nixpkgs-channels/commits
-    cat ${./data/repos/NixOS/nixpkgs-channels/commits.json} | jq -j '.[0] | .sha' > mock/repos/NixOS/nixpkgs-channels/commits/nixos-19.03
+    cat ${./data/repos/NixOS/nixpkgs-channels/commits.json} | jq -j '.[0] | .sha' > mock/repos/NixOS/nixpkgs-channels/commits/nixos-19.09
     mkdir -p mock/NixOS/nixpkgs-channels/archive
     cp ${./data/archives + "/${nixpkgs-channels_HEAD}.tar.gz"} \
       mock/NixOS/nixpkgs-channels/archive/${nixpkgs-channels_HEAD}.tar.gz
diff --git a/tests/github/expected/niv-init.json b/tests/github/expected/niv-init.json
index a9e8ae0..9ac732d 100644
--- a/tests/github/expected/niv-init.json
+++ b/tests/github/expected/niv-init.json
@@ -12,7 +12,7 @@
         "url_template": "http://localhost:3333/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
-        "branch": "nixos-19.03",
+        "branch": "nixos-19.09",
         "description": "Nixpkgs/NixOS branches that track the Nixpkgs/NixOS channels",
         "homepage": null,
         "owner": "NixOS",