diff --git a/Dockerfile b/Dockerfile
index 40d6958..289b9a2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,7 @@ RUN set -ex \
       libxml2-dev libxslt-dev \
     && python3 -m venv $VIRTUAL_ENV/ \
     && source $VIRTUAL_ENV/bin/activate \
+    && pip install pip wheel -U \
     && pip install -r requirements.txt \
     && apk del .build-deps
 COPY logging.ini setup.cfg setup.py ./
diff --git a/corpus.json b/corpus.json
index 55edc82..5ef07d2 100644
--- a/corpus.json
+++ b/corpus.json
@@ -1,18 +1,18 @@
 {
   "PerseusDL/canonical-latinLit": {
-    "ref": "0.0.877",
-    "sha": "9ae80f4c0cf71c52e64228ea53c28809922d3e2b",
-    "tarball_url": "https://api.github.com/repos/PerseusDL/canonical-latinLit/tarball/0.0.877"
+    "ref": "0.0.963",
+    "sha": "fd5bb4b2fc675a1f9111e783440f90c856e5a61e",
+    "tarball_url": "https://api.github.com/repos/PerseusDL/canonical-latinLit/tarball/0.0.963"
   },
   "PerseusDL/canonical-greekLit": {
-    "ref": "0.0.2911",
-    "sha": "6e2efe938ac971d75ed41c05107461edb1a43f41",
-    "tarball_url": "https://api.github.com/repos/PerseusDL/canonical-greekLit/tarball/0.0.2911"
+    "ref": "0.0.2940",
+    "sha": "382365f5aca95c733d7e521bdcc7a4c2fc25ac6c",
+    "tarball_url": "https://api.github.com/repos/PerseusDL/canonical-greekLit/tarball/0.0.2940"
   },
   "OpenGreekAndLatin/csel-dev": {
-    "ref": "1.0.223",
-    "sha": "70736880b0c26176000a4b3c600606f8fc5d2bbc",
-    "tarball_url": "https://api.github.com/repos/OpenGreekAndLatin/csel-dev/tarball/1.0.223"
+    "ref": "1.0.250",
+    "sha": "41e8aadc5fab7c7af58e0b540d3a2c59ebd7c0c1",
+    "tarball_url": "https://api.github.com/repos/OpenGreekAndLatin/csel-dev/tarball/1.0.250"
   },
   "PerseusDL/canonical-farsiLit": {
     "ref": "0.0.11",
@@ -25,9 +25,9 @@
     "tarball_url": "https://api.github.com/repos/PerseusDL/canonical-pdlpsci/tarball/0.0.56"
   },
   "OpenGreekAndLatin/First1KGreek": {
-    "ref": "1.1.5622",
-    "sha": "678751aa81407614777592c76143ec2f55fa3c94",
-    "tarball_url": "https://api.github.com/repos/OpenGreekAndLatin/First1KGreek/tarball/1.1.5622"
+    "ref": "1.1.5669",
+    "sha": "20d1b7b971af52e5de3d4769eb05a8e142b5e159",
+    "tarball_url": "https://api.github.com/repos/OpenGreekAndLatin/First1KGreek/tarball/1.1.5669"
   },
   "OpenGreekAndLatin/Latin": {
     "ref": "v1.12.0",