diff --git a/paperlibrary/api/api.py b/paperlibrary/api/api.py
index 4f87a47..8c836e9 100644
--- a/paperlibrary/api/api.py
+++ b/paperlibrary/api/api.py
@@ -45,8 +45,8 @@ class PaperLibraryAPI:
         return years
 
     @lru_cache
-    def fetch_bibliography(self) -> str:
-        r = self.s.get(self.baseURL + "bibtex/")
+    def fetch_bibliography(self, tag=None) -> str:
+        r = self.s.get(self.baseURL + "bibtex/", params={"tag": tag})
         r.raise_for_status()
         return r.text
 
diff --git a/paperlibrary/library/library.py b/paperlibrary/library/library.py
index a4cf26e..26fd438 100644
--- a/paperlibrary/library/library.py
+++ b/paperlibrary/library/library.py
@@ -51,6 +51,8 @@ def write_symlinks(api: PaperLibraryAPI, config: Config):
     custom_title_dir = basedir / "by_custom_title"
     citation_key_dir = basedir / "by_citation_key"
 
+    tags = set()
+
     for directory in [author_dir, keyword_dir, year_dir, title_dir, tags_dir, custom_title_dir, citation_key_dir]:
         shutil.rmtree(directory, ignore_errors=True)
         directory.mkdir()
@@ -77,6 +79,7 @@ def write_symlinks(api: PaperLibraryAPI, config: Config):
             tag_dir = tags_dir / tag
             tag_dir.mkdir(exist_ok=True, parents=True)
             link_file(pdf_dir, tag_dir, paper, paper.title)
+            tags.add(tag)
 
         if not paper.custom_title:
             continue
@@ -92,6 +95,9 @@ def write_symlinks(api: PaperLibraryAPI, config: Config):
         for paper in papers:
             link_file(pdf_dir, year_subdir, paper)
 
+    for tag in tags:
+        write_bibliography(api, config, tag)
+
 
 def download_file(api: PaperLibraryAPI, url: str, target_file: Path):
     r = api.s.get(url)
@@ -176,8 +182,13 @@ def update_notes(api: PaperLibraryAPI, config: Config):
         api.update_note(paper.id, file_text)
 
 
-def write_bibliography(api: PaperLibraryAPI, config: Config):
-    bib = api.fetch_bibliography()
-    target_file = config.basedir_path / "bibliography.bib"
+def write_bibliography(api: PaperLibraryAPI, config: Config, tag: str = None):
+    tags_dir = config.basedir_path / "by_tags"
+    if tag:
+        dir = tags_dir / tag
+    else:
+        dir = config.basedir_path
+    bib = api.fetch_bibliography(tag)
+    target_file = dir / "bibliography.bib"
     with target_file.open("w") as f:
         f.write(bib)