diff --git a/.Rbuildignore b/.Rbuildignore
index ea0336b7..cac23d10 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -14,7 +14,7 @@
 ^README\.Rmd$
 ^pkgdown$
 ^data-raw$
-^\.bumpversion\.cfg$
+^\.bumpversion\.toml$
 
 inst/rmd/rnasum.html
 ^CODE_OF_CONDUCT\.md$
diff --git a/.bumpversion.cfg b/.bumpversion.cfg
deleted file mode 100644
index f2e27b17..00000000
--- a/.bumpversion.cfg
+++ /dev/null
@@ -1,23 +0,0 @@
-[bumpversion]
-current_version = 1.1.0
-commit = True
-parse = (?P<major>\d+)\.(?P<minor>\d+)\.(?P<patch>\d+)(\.(?P<dev>\d+))?
-serialize = 
-	{major}.{minor}.{patch}.{dev}
-	{major}.{minor}.{patch}
-
-[bumpversion:file:DESCRIPTION]
-search = Version: {current_version}
-replace = Version: {new_version}
-
-[bumpversion:file:.github/workflows/conda_docker_pkgdown.yml]
-search = VERSION: '{current_version}'
-replace = VERSION: '{new_version}'
-
-[bumpversion:file:deploy/conda/env/yaml/rnasum.yaml]
-search = r-rnasum =={current_version}
-replace = r-rnasum =={new_version}
-
-[bumpversion:file:deploy/conda/recipe/meta.yaml]
-search = version: {current_version}
-replace = version: {new_version}
diff --git a/.bumpversion.toml b/.bumpversion.toml
new file mode 100644
index 00000000..0a75636e
--- /dev/null
+++ b/.bumpversion.toml
@@ -0,0 +1,40 @@
+[tool.bumpversion]
+current_version = "1.1.0"
+search = "{current_version}"
+replace = "{new_version}"
+message = "Bump version: {current_version} → {new_version}"
+regex = false
+ignore_missing_version = false
+ignore_missing_files = false
+commit = true
+parse = """(?x)
+    (?P<major>0|[1-9]\\d*)\\.
+    (?P<minor>0|[1-9]\\d*)\\.
+    (?P<patch>0|[1-9]\\d*)
+    (?:\\.(?P<dev>\\d+))?
+"""
+
+serialize = [
+    "{major}.{minor}.{patch}.{dev}",
+    "{major}.{minor}.{patch}",
+]
+
+[[tool.bumpversion.files]]
+filename = "DESCRIPTION"
+search = "Version: {current_version}"
+replace = "Version: {new_version}"
+
+[[tool.bumpversion.files]]
+filename = ".github/workflows/conda_docker_pkgdown.yml"
+search = "VERSION: '{current_version}'"
+replace = "VERSION: '{new_version}'"
+
+[[tool.bumpversion.files]]
+filename = "deploy/conda/env/yaml/rnasum.yaml"
+search = "r-rnasum =={current_version}"
+replace = "r-rnasum =={new_version}"
+
+[[tool.bumpversion.files]]
+filename = "deploy/conda/recipe/meta.yaml"
+search = "version: {current_version}"
+replace = "version: {new_version}"
diff --git a/.github/workflows/conda_docker_pkgdown.yml b/.github/workflows/conda_docker_pkgdown.yml
index da71640b..4b13b6fc 100644
--- a/.github/workflows/conda_docker_pkgdown.yml
+++ b/.github/workflows/conda_docker_pkgdown.yml
@@ -9,7 +9,7 @@ env:
   recipe_path: deploy/conda/recipe
   env_yaml_path: deploy/conda/env/yaml
   env_lock_path: deploy/conda/env/lock
-  VERSION: '1.1.0' # versioned by bump2version
+  VERSION: '1.1.0' # bump
 
 jobs:
   condarise-dockerise-document:
diff --git a/deploy/conda/env/yaml/rnasum.yaml b/deploy/conda/env/yaml/rnasum.yaml
index edbbfad1..be07b9c9 100644
--- a/deploy/conda/env/yaml/rnasum.yaml
+++ b/deploy/conda/env/yaml/rnasum.yaml
@@ -6,4 +6,4 @@ channels:
   - bioconda
 
 dependencies:
-  - r-rnasum ==1.1.0 # versioned by bump2version
+  - r-rnasum ==1.1.0 # bump
diff --git a/deploy/conda/recipe/meta.yaml b/deploy/conda/recipe/meta.yaml
index 8edf6aff..767e8d03 100644
--- a/deploy/conda/recipe/meta.yaml
+++ b/deploy/conda/recipe/meta.yaml
@@ -1,6 +1,6 @@
 package:
   name: r-rnasum
-  version: 1.1.0 # bump2version
+  version: 1.1.0 # bump
 
 source:
   path: ../../../