diff --git a/CHANGELOG.md b/CHANGELOG.md
index f62ecb0..b4da9af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,11 @@ The format is based on [Keep a Changelog], and this project adheres to
 [keep a changelog]: https://keepachangelog.com/en/1.0.0/
 [semantic versioning]: https://semver.org/spec/v2.0.0.html
 
+## [0.1.3] - 2023-03-03
+
+- Return environment variable naming to match v0.1.1, as the change in v0.1.2
+  was not intended.
+
 ## [0.1.2] - 2023-03-03
 
 - Use Go v1.20 at runtime (via `golang:latest` docker image)
@@ -28,6 +33,7 @@ The format is based on [Keep a Changelog], and this project adheres to
 [0.1.0]: https://github.com/dogmatiq/browser/releases/v0.1.0
 [0.1.1]: https://github.com/dogmatiq/browser/releases/v0.1.1
 [0.1.2]: https://github.com/dogmatiq/browser/releases/v0.1.2
+[0.1.3]: https://github.com/dogmatiq/browser/releases/v0.1.3
 
 <!-- version template
 ## [0.0.1] - YYYY-MM-DD
diff --git a/ENVIRONMENT.md b/ENVIRONMENT.md
index f3e7748..fba008d 100644
--- a/ENVIRONMENT.md
+++ b/ENVIRONMENT.md
@@ -14,11 +14,11 @@ equivalent.
 ## Index
 
 - [`DSN`](#DSN) — the PostgreSQL connection string
-- [`GITHUB_APP_CLIENT_ID`](#GITHUB_APP_CLIENT_ID) — the client ID of the GitHub application used to read repository content
-- [`GITHUB_APP_CLIENT_SECRET`](#GITHUB_APP_CLIENT_SECRET) — the client secret for the GitHub application used to read repository content
 - [`GITHUB_APP_ID`](#GITHUB_APP_ID) — the ID of the GitHub application used to read repository content
-- [`GITHUB_APP_PRIVATE_KEY`](#GITHUB_APP_PRIVATE_KEY) — the private key for the GitHub application used to read repository content
+- [`GITHUB_CLIENT_ID`](#GITHUB_CLIENT_ID) — the client ID of the GitHub application used to read repository content
+- [`GITHUB_CLIENT_SECRET`](#GITHUB_CLIENT_SECRET) — the client secret for the GitHub application used to read repository content
 - [`GITHUB_HOOK_SECRET`](#GITHUB_HOOK_SECRET) — the secret used to verify GitHub web-hook requests are genuine
+- [`GITHUB_PRIVATE_KEY`](#GITHUB_PRIVATE_KEY) — the private key for the GitHub application used to read repository content
 - [`GITHUB_URL`](#GITHUB_URL) — the base URL of the GitHub API
 
 ## Specification
@@ -35,64 +35,64 @@ exit with a non-zero exit code.
 export DSN=foo # (non-normative)
 ```
 
-### `GITHUB_APP_CLIENT_ID`
+### `GITHUB_APP_ID`
 
-> the client ID of the GitHub application used to read repository content
+> the ID of the GitHub application used to read repository content
 
-This variable **MUST** be set to a non-empty string.
+This variable **MUST** be set to `1` or greater.
 If left undefined the application will print usage information to `STDERR` then
 exit with a non-zero exit code.
 
 ```bash
-export GITHUB_APP_CLIENT_ID=foo # (non-normative)
+export GITHUB_APP_ID=4611686018427387904 # (non-normative)
 ```
 
-### `GITHUB_APP_CLIENT_SECRET`
+### `GITHUB_CLIENT_ID`
 
-> the client secret for the GitHub application used to read repository content
+> the client ID of the GitHub application used to read repository content
 
 This variable **MUST** be set to a non-empty string.
 If left undefined the application will print usage information to `STDERR` then
 exit with a non-zero exit code.
 
 ```bash
-export GITHUB_APP_CLIENT_SECRET=foo # (non-normative)
+export GITHUB_CLIENT_ID=foo # (non-normative)
 ```
 
-### `GITHUB_APP_ID`
+### `GITHUB_CLIENT_SECRET`
 
-> the ID of the GitHub application used to read repository content
+> the client secret for the GitHub application used to read repository content
 
-This variable **MUST** be set to `1` or greater.
+This variable **MUST** be set to a non-empty string.
 If left undefined the application will print usage information to `STDERR` then
 exit with a non-zero exit code.
 
 ```bash
-export GITHUB_APP_ID=4611686018427387904 # (non-normative)
+export GITHUB_CLIENT_SECRET=foo # (non-normative)
 ```
 
-### `GITHUB_APP_PRIVATE_KEY`
+### `GITHUB_HOOK_SECRET`
 
-> the private key for the GitHub application used to read repository content
+> the secret used to verify GitHub web-hook requests are genuine
 
 This variable **MUST** be set to a non-empty string.
 If left undefined the application will print usage information to `STDERR` then
 exit with a non-zero exit code.
 
 ```bash
-export GITHUB_APP_PRIVATE_KEY=foo # (non-normative)
+export GITHUB_HOOK_SECRET=foo # (non-normative)
 ```
 
-### `GITHUB_HOOK_SECRET`
+### `GITHUB_PRIVATE_KEY`
 
-> the secret used to verify GitHub web-hook requests are genuine
+> the private key for the GitHub application used to read repository content
 
 This variable **MUST** be set to a non-empty string.
 If left undefined the application will print usage information to `STDERR` then
 exit with a non-zero exit code.
 
 ```bash
-export GITHUB_HOOK_SECRET=foo # (non-normative)
+export GITHUB_PRIVATE_KEY=foo # (non-normative)
 ```
 
 ### `GITHUB_URL`
@@ -126,16 +126,16 @@ spec:
           env:
             - name: DSN # the PostgreSQL connection string
               value: foo
-            - name: GITHUB_APP_CLIENT_ID # the client ID of the GitHub application used to read repository content
-              value: foo
-            - name: GITHUB_APP_CLIENT_SECRET # the client secret for the GitHub application used to read repository content
-              value: foo
             - name: GITHUB_APP_ID # the ID of the GitHub application used to read repository content
               value: "4611686018427387904"
-            - name: GITHUB_APP_PRIVATE_KEY # the private key for the GitHub application used to read repository content
+            - name: GITHUB_CLIENT_ID # the client ID of the GitHub application used to read repository content
+              value: foo
+            - name: GITHUB_CLIENT_SECRET # the client secret for the GitHub application used to read repository content
               value: foo
             - name: GITHUB_HOOK_SECRET # the secret used to verify GitHub web-hook requests are genuine
               value: foo
+            - name: GITHUB_PRIVATE_KEY # the private key for the GitHub application used to read repository content
+              value: foo
             - name: GITHUB_URL # the base URL of the GitHub API
               value: https://example.org/path
 ```
@@ -150,11 +150,11 @@ metadata:
   name: example-config-map
 data:
   DSN: foo # the PostgreSQL connection string
-  GITHUB_APP_CLIENT_ID: foo # the client ID of the GitHub application used to read repository content
-  GITHUB_APP_CLIENT_SECRET: foo # the client secret for the GitHub application used to read repository content
   GITHUB_APP_ID: "4611686018427387904" # the ID of the GitHub application used to read repository content
-  GITHUB_APP_PRIVATE_KEY: foo # the private key for the GitHub application used to read repository content
+  GITHUB_CLIENT_ID: foo # the client ID of the GitHub application used to read repository content
+  GITHUB_CLIENT_SECRET: foo # the client secret for the GitHub application used to read repository content
   GITHUB_HOOK_SECRET: foo # the secret used to verify GitHub web-hook requests are genuine
+  GITHUB_PRIVATE_KEY: foo # the private key for the GitHub application used to read repository content
   GITHUB_URL: https://example.org/path # the base URL of the GitHub API
 ---
 apiVersion: apps/v1
@@ -184,11 +184,11 @@ service:
   example-service:
     environment:
       DSN: foo # the PostgreSQL connection string
-      GITHUB_APP_CLIENT_ID: foo # the client ID of the GitHub application used to read repository content
-      GITHUB_APP_CLIENT_SECRET: foo # the client secret for the GitHub application used to read repository content
       GITHUB_APP_ID: "4611686018427387904" # the ID of the GitHub application used to read repository content
-      GITHUB_APP_PRIVATE_KEY: foo # the private key for the GitHub application used to read repository content
+      GITHUB_CLIENT_ID: foo # the client ID of the GitHub application used to read repository content
+      GITHUB_CLIENT_SECRET: foo # the client secret for the GitHub application used to read repository content
       GITHUB_HOOK_SECRET: foo # the secret used to verify GitHub web-hook requests are genuine
+      GITHUB_PRIVATE_KEY: foo # the private key for the GitHub application used to read repository content
       GITHUB_URL: https://example.org/path # the base URL of the GitHub API
 ```
 
diff --git a/cmd/browser/env.go b/cmd/browser/env.go
index 26256af..89f63fb 100644
--- a/cmd/browser/env.go
+++ b/cmd/browser/env.go
@@ -8,15 +8,15 @@ var githubAppID = ferrite.
 	Required()
 
 var githubAppClientID = ferrite.
-	String("GITHUB_APP_CLIENT_ID", "the client ID of the GitHub application used to read repository content").
+	String("GITHUB_CLIENT_ID", "the client ID of the GitHub application used to read repository content").
 	Required()
 
 var githubAppClientSecret = ferrite.
-	String("GITHUB_APP_CLIENT_SECRET", "the client secret for the GitHub application used to read repository content").
+	String("GITHUB_CLIENT_SECRET", "the client secret for the GitHub application used to read repository content").
 	Required()
 
 var githubAppPrivateKey = ferrite.
-	String("GITHUB_APP_PRIVATE_KEY", "the private key for the GitHub application used to read repository content").
+	String("GITHUB_PRIVATE_KEY", "the private key for the GitHub application used to read repository content").
 	Required()
 
 var githubAppHookSecret = ferrite.