diff --git a/requirements.in b/requirements.in
index bc2f5f7..15f61b2 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,4 +1,4 @@
-black ~= 23.9.1
+black ~= 23.12.0
 Flask ~= 3.0.0
 flake8 ~= 6.1.0
 pytest ~= 7.4.2
diff --git a/requirements.txt b/requirements.txt
index d256d7f..c885eca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,13 @@
 #
 #    pip-compile --resolver=backtracking
 #
-black==23.9.1
+aiohttp==3.9.1
+    # via black
+aiosignal==1.3.1
+    # via aiohttp
+attrs==23.1.0
+    # via aiohttp
+black==23.12.0
     # via -r requirements.in
 blinker==1.6.2
     # via flask
@@ -13,11 +19,19 @@ click==8.1.3
     #   black
     #   flask
 coverage[toml]==7.0.4
-    # via pytest-cov
+    # via
+    #   coverage
+    #   pytest-cov
 flake8==6.1.0
     # via -r requirements.in
 flask==3.0.0
     # via -r requirements.in
+frozenlist==1.4.1
+    # via
+    #   aiohttp
+    #   aiosignal
+idna==3.6
+    # via yarl
 iniconfig==2.0.0
     # via pytest
 itsdangerous==2.1.2
@@ -30,6 +44,10 @@ markupsafe==2.1.1
     #   werkzeug
 mccabe==0.7.0
     # via flake8
+multidict==6.0.4
+    # via
+    #   aiohttp
+    #   yarl
 mypy-extensions==0.4.3
     # via black
 packaging==23.0
@@ -62,3 +80,5 @@ tabulate==0.9.0
     # via -r requirements.in
 werkzeug==3.0.1
     # via flask
+yarl==1.9.4
+    # via aiohttp