diff --git a/nix_update/update.py b/nix_update/update.py
index 1c80de8..d886edb 100644
--- a/nix_update/update.py
+++ b/nix_update/update.py
@@ -314,6 +314,9 @@ def update_version(
             package.diff_url = f"https://{package.parsed_url.netloc}/{owner}/{repo}/compare/{package.rev}...{new_version.rev or new_version.number}"
         elif GITLAB_API.match(package.parsed_url.geturl()) and package.src_homepage:
             package.diff_url = f"{package.src_homepage}-/compare/{package.rev}...{new_version.rev or new_version.number}"
+        elif package.parsed_url.netloc in ["bitbucket.org", "bitbucket.io"]:
+            _, owner, repo, *_ = package.parsed_url.path.split("/")
+            package.diff_url = f"https://{package.parsed_url.netloc}/{owner}/{repo}/branches/compare/{new_version.rev or new_version.number}%0D{package.rev}"
 
     return replace_version(package)
 
diff --git a/nix_update/version/__init__.py b/nix_update/version/__init__.py
index 458ffec..401c077 100644
--- a/nix_update/version/__init__.py
+++ b/nix_update/version/__init__.py
@@ -5,6 +5,7 @@
 from urllib.parse import ParseResult
 
 from ..errors import VersionError
+from .bitbucket import fetch_bitbucket_snapshots, fetch_bitbucket_versions
 from .crate import fetch_crate_versions
 from .gitea import fetch_gitea_snapshots, fetch_gitea_versions
 from .github import fetch_github_snapshots, fetch_github_versions
@@ -39,12 +40,14 @@ def __call__(self, url: ParseResult, branch: str) -> list[Version]:
     fetch_rubygem_versions,
     fetch_savannah_versions,
     fetch_sourcehut_versions,
+    fetch_bitbucket_versions,
 ]
 
 branch_snapshots_fetchers: list[SnapshotFetcher] = [
     fetch_gitea_snapshots,
     fetch_github_snapshots,
     fetch_gitlab_snapshots,
+    fetch_bitbucket_snapshots,
 ]
 
 
diff --git a/nix_update/version/bitbucket.py b/nix_update/version/bitbucket.py
new file mode 100644
index 0000000..4d2234c
--- /dev/null
+++ b/nix_update/version/bitbucket.py
@@ -0,0 +1,30 @@
+import json
+from urllib.parse import ParseResult
+from urllib.request import urlopen
+
+from .version import Version
+
+
+def fetch_bitbucket_versions(url: ParseResult) -> list[Version]:
+    if url.netloc not in ["bitbucket.org", "bitbucket.io"]:
+        return []
+
+    _, owner, repo, *_ = url.path.split("/")
+    # paging controlled by pagelen parameter, by default it is 10
+    tags_url = f"https://{url.netloc}/!api/2.0/repositories/{owner}/{repo}/refs/tags?sort=-target.date"
+    resp = urlopen(tags_url)
+    tags = json.loads(resp.read())["values"]
+    return [Version(tag["name"]) for tag in tags]
+
+
+def fetch_bitbucket_snapshots(url: ParseResult, branch: str) -> list[Version]:
+    if url.netloc not in ["bitbucket.org", "bitbucket.io"]:
+        return []
+
+    _, owner, repo, *_ = url.path.split("/")
+    # seems to ignore pagelen parameter (always returns one entry)
+    commits_url = f'https://{url.netloc}/!api/2.0/repositories/{owner}/{repo}/refs?q=name="{branch}"'
+    resp = urlopen(commits_url)
+    ref = json.loads(resp.read())["values"][0]["target"]
+    date = ref["date"][:10]  # to YYYY-MM-DD
+    return [Version(f"unstable-{date}", rev=ref["hash"])]