diff --git a/src/requirements.in b/src/requirements.in
index f749648c3..3dd56e373 100644
--- a/src/requirements.in
+++ b/src/requirements.in
@@ -20,7 +20,7 @@ jsonschema == 4.23.0
 lru_dict == 1.3.0
 Markdown == 3.6
 more-ds == 0.0.6
-more-itertools == 10.3.0
+more-itertools == 10.4.0
 openapi-spec-validator == 0.7.1
 opencensus-ext-azure >= 1.1.13
 opencensus-ext-django >= 0.8
diff --git a/src/requirements.txt b/src/requirements.txt
index 04d0411ce..b1f4b5799 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -803,9 +803,9 @@ more-ds==0.0.6 \
     # via
     #   -r requirements.in
     #   amsterdam-schema-tools
-more-itertools==10.3.0 \
-    --hash=sha256:e5d93ef411224fbcef366a6e8ddc4c5781bc6359d43412a65dd5964e46111463 \
-    --hash=sha256:ea6a02e24a9161e51faad17a8782b92a0df82c12c1c8886fec7f0c3fa1a1b320
+more-itertools==10.4.0 \
+    --hash=sha256:0f7d9f83a0a8dcfa8a2694a770590d98a67ea943e3d9f5298309a484758c4e27 \
+    --hash=sha256:fe0e63c4ab068eac62410ab05cccca2dc71ec44ba8ef29916a0090df061cf923
     # via
     #   -r requirements.in
     #   amsterdam-schema-tools
diff --git a/src/requirements_dev.txt b/src/requirements_dev.txt
index 096977b21..456c81f18 100644
--- a/src/requirements_dev.txt
+++ b/src/requirements_dev.txt
@@ -857,9 +857,9 @@ more-ds==0.0.6 \
     # via
     #   -r ./requirements.in
     #   amsterdam-schema-tools
-more-itertools==10.3.0 \
-    --hash=sha256:e5d93ef411224fbcef366a6e8ddc4c5781bc6359d43412a65dd5964e46111463 \
-    --hash=sha256:ea6a02e24a9161e51faad17a8782b92a0df82c12c1c8886fec7f0c3fa1a1b320
+more-itertools==10.4.0 \
+    --hash=sha256:0f7d9f83a0a8dcfa8a2694a770590d98a67ea943e3d9f5298309a484758c4e27 \
+    --hash=sha256:fe0e63c4ab068eac62410ab05cccca2dc71ec44ba8ef29916a0090df061cf923
     # via
     #   -r ./requirements.in
     #   amsterdam-schema-tools