diff --git a/scripts/build-unit-test-docker b/scripts/build-unit-test-docker
index c7bb94a..c52fad4 100755
--- a/scripts/build-unit-test-docker
+++ b/scripts/build-unit-test-docker
@@ -859,6 +859,7 @@
 
 RUN npm install -g \
         eslint@latest eslint-plugin-json@latest \
+        markdownlint-cli@latest \
         prettier@latest
 """
 
diff --git a/scripts/format-code.sh b/scripts/format-code.sh
index f6eaacc..9a1eb16 100755
--- a/scripts/format-code.sh
+++ b/scripts/format-code.sh
@@ -34,6 +34,7 @@
         eslint \
         flake8 \
         isort \
+        markdownlint \
         prettier \
         shellcheck \
     )
@@ -209,6 +210,16 @@
     isort --profile black "$@"
 }
 
+LINTER_REQUIRE+=([markdownlint]="markdownlint;.markdownlint.yaml;${CONFIG_PATH}/markdownlint.yaml")
+LINTER_IGNORE+=([markdownlint]=".markdownlint-ignore")
+LINTER_TYPES+=([markdownlint]="markdown")
+function do_markdownlint() {
+    markdownlint --config "${LINTER_CONFIG[markdownlint]}" \
+        --disable line-length -- "$@" || \
+        echo -e "    ${YELLOW}Failed markdownlint; temporarily ignoring."
+    # We disable line-length because prettier should handle prose wrap for us.
+}
+
 LINTER_REQUIRE+=([prettier]="prettier;.prettierrc.yaml;${CONFIG_PATH}/prettierrc.yaml")
 LINTER_IGNORE+=([prettier]=".prettierignore")
 LINTER_TYPES+=([prettier]="json;markdown;yaml")