diff --git a/bootstrap-sha256sums.txt b/bootstrap-sha256sums.txt
index ed58208d..ec5da3eb 100644
--- a/bootstrap-sha256sums.txt
+++ b/bootstrap-sha256sums.txt
@@ -1,5 +1,9 @@
+3311829da6c010d989e1e818ea15774a3c93d04e49e138f903204ba62ca7a682  Babel-2.9.1-py2.py3-none-any.whl
+bc0c176f9f6a994582230df350aa6e05ba2ebe4b3ac317eab29d9be5d2768da0  Babel-2.9.1.tar.gz
 3fe8fac398ae76f534dee92c0db01c2960e271094f8cd52aa9d24a633c244e59  build-0.3.0-py2.py3-none-any.whl
 0eb95b2c8d770d7c4c9b92c68c227c350bbf65f3ec83551ace9097c18cc15fdd  build-0.3.0.tar.gz
+3b0769bd65ca00ffcb57975e750fac079639a3d3ce393c5a0d4c65123141c87a  click-7.1.2-py2.py3-none-any.whl
+d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a  click-7.1.2.tar.gz
 8c9eec7e9de2a30861ca347d0a149cc1482de12fc765fa06c414930e8ce20d0a  Cython-0.29.22-cp37-cp37m-linux_x86_64.whl
 df6b83c7a6d1d967ea89a2903e4a931377634a297459652e4551734c48195406  Cython-0.29.22.tar.gz
 a14d6cca50a51eff2c418fc3f8e887cd31a3233a6b465451fd57074e232d7c4c  flit_core-2.3.0-py2.py3-none-any.whl
@@ -12,12 +16,16 @@ bfe04a1859fd3cbd3bc2a1ffd2a6dbf30e912bf7fc36ed55d4c838d642c55934  pep517-0.9.1-p
 aeb78601f2d1aa461960b43add204cc7955667687fbcf9cdb5170f00556f117f  pep517-0.9.1.tar.gz
 f266816461e421e2bbdb61e6e122d01fe638b5710698879ab283cc456aabd1d1  pip-21.0.1-py3-none-any.whl
 99bbde183ec5ec037318e774b0d8ae0a64352fe53b2c7fd630be1d07e94f41e5  pip-21.0.1.tar.gz
+bab8000c26c590c10d33a40cf524cc65df925224c556b429b666b3478158f2b9  pip_tools-6.0.1-py3-none-any.whl
+3b0c7b95e8d3dfb011bb42cb38f356fcf5d0630480462b59c4d0a112b8d90281  pip-tools-6.0.1.tar.gz
 4d00a1a6d2bf41a459fa6f47d41a1c5d157715283c2dc4a4b291972037bc9620  pyparsing-2.4.7-py2.py3-none-any.whl
 c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1  pyparsing-2.4.7.tar.gz
 3084ada00452395171c8f10199d2b5d3b74c6948518c2b6bd75e948c77ca2280  pytest_runner-5.3.0-py3-none-any.whl
 ca3f58ff4957e8be6c54c55d575b235725cbbcf4dc0d5091c29c6444cfc8a5fe  pytest-runner-5.3.0.tar.gz
 97e4f6bd5d1d2a32f82d5c6ec9bb90a1b60db3af81b6427ee9a5949021d56d7b  pytoml-0.1.21-py2.py3-none-any.whl
 8eecf7c8d0adcff3b375b09fe403407aa9b645c499e5ab8cac670ac4a35f61e7  pytoml-0.1.21.tar.gz
+b454262bbf4844ddf1e13826f7e5753cea5e020355d2b61f211b53ce3e8ab968  pytz-2021.1-py3-none-any.whl
+83a4a90894bf38e243cf052c8b58f381bfe9a7a483f6a9cab140bc7f702ac4da  pytz-2021.1.tar.gz
 d55810b08ce4cef4d4e354e4fc1013c435abf3a9712daa4f48dcfc8694f4722f  setuptools-54.0.0-py3-none-any.whl
 34efee89c4c879204f5739ec6d9d3635195b0b7d2b51e25c9261a327367ec5ff  setuptools-54.0.0.tar.gz
 96d120093688708a75155802077cc3fefd4352b2b5e30386821e86bbc4c8c402  setuptools_scm-5.0.2-py2.py3-none-any.whl
diff --git a/bootstrap/Babel-2.9.1-py2.py3-none-any.whl b/bootstrap/Babel-2.9.1-py2.py3-none-any.whl
new file mode 100644
index 00000000..215812c8
--- /dev/null
+++ b/bootstrap/Babel-2.9.1-py2.py3-none-any.whl
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3311829da6c010d989e1e818ea15774a3c93d04e49e138f903204ba62ca7a682
+size 8832555
diff --git a/bootstrap/Babel-2.9.1.tar.gz b/bootstrap/Babel-2.9.1.tar.gz
new file mode 100644
index 00000000..ce78df76
--- /dev/null
+++ b/bootstrap/Babel-2.9.1.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:bc0c176f9f6a994582230df350aa6e05ba2ebe4b3ac317eab29d9be5d2768da0
+size 8683505
diff --git a/bootstrap/pytz-2021.1-py3-none-any.whl b/bootstrap/pytz-2021.1-py3-none-any.whl
new file mode 100644
index 00000000..effcb943
--- /dev/null
+++ b/bootstrap/pytz-2021.1-py3-none-any.whl
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b454262bbf4844ddf1e13826f7e5753cea5e020355d2b61f211b53ce3e8ab968
+size 503057
diff --git a/bootstrap/pytz-2021.1.tar.gz b/bootstrap/pytz-2021.1.tar.gz
new file mode 100644
index 00000000..fb800a6c
--- /dev/null
+++ b/bootstrap/pytz-2021.1.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:83a4a90894bf38e243cf052c8b58f381bfe9a7a483f6a9cab140bc7f702ac4da
+size 317945
diff --git a/requirements.in b/requirements.in
index 9aef757b..8a52bdea 100644
--- a/requirements.in
+++ b/requirements.in
@@ -18,3 +18,6 @@ flit_core >=2,<3
 
 # For maintaining requirements files
 pip-tools>=6
+
+# For localized (translated) packages:
+Babel==2.9.1  # per freedomofpress/securedrop-client:requirements/dev-requirements.in
diff --git a/requirements.txt b/requirements.txt
index 426f79f4..49afe827 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,10 @@
 #
 #    pip-compile --allow-unsafe --generate-hashes --output-file=requirements.txt requirements.in
 #
+babel==2.9.1 \
+    --hash=sha256:ab49e12b91d937cd11f0b67cb259a57ab4ad2b59ac7a3b41d6c06c0ac5b0def9 \
+    --hash=sha256:bc0c176f9f6a994582230df350aa6e05ba2ebe4b3ac317eab29d9be5d2768da0
+    # via -r requirements.in
 build==0.3.0 \
     --hash=sha256:0eb95b2c8d770d7c4c9b92c68c227c350bbf65f3ec83551ace9097c18cc15fdd \
     --hash=sha256:75bc5676b1a014fb996dc96914428b197d174364392a46778200d5e115ffe76c
@@ -81,6 +85,10 @@ pytoml==0.1.21 \
     --hash=sha256:57a21e6347049f73bfb62011ff34cd72774c031b9828cb628a752225136dfc33 \
     --hash=sha256:8eecf7c8d0adcff3b375b09fe403407aa9b645c499e5ab8cac670ac4a35f61e7
     # via flit-core
+pytz==2021.1 \
+    --hash=sha256:83a4a90894bf38e243cf052c8b58f381bfe9a7a483f6a9cab140bc7f702ac4da \
+    --hash=sha256:eb10ce3e7736052ed3623d49975ce333bcd712c7bb19a58b9e2089d4057d0798
+    # via babel
 setuptools-scm==5.0.2 \
     --hash=sha256:83a0cedd3449e3946307811a4c7b9d89c4b5fd464a2fb5eeccd0a5bb158ae5c8 \
     --hash=sha256:bd5c4e37f74c103e117549f89aeb3c244488c4a6422df786d1a7d03257f16b34