diff --git a/.github/workflows/cmake-multi-platform.yml b/.github/workflows/cmake-multi-platform.yml
index 5d2350a6..11bbec39 100644
--- a/.github/workflows/cmake-multi-platform.yml
+++ b/.github/workflows/cmake-multi-platform.yml
@@ -56,8 +56,20 @@ jobs:
     - name: Install ICU (Ubuntu/macos)
       run: |
         if [[ "${{ matrix.os }}" == "ubuntu-latest" ]]; then
-          sudo apt-get update && sudo apt-get install -y libicu-dev icu-devtools
-          echo "ICU_ROOT=/usr" >> $GITHUB_ENV
+          wget https://github.com/unicode-org/icu/releases/download/release-77-1/icu4c-77_1-Ubuntu22.04-x64.tgz
+          export TMP="/tmp/icu/"
+          # It may exist already - remove old stuff
+          mkdir -p $TMP
+          rm -rf $TMP/*
+
+          # Get the release and unpack.
+          cp icu4c-77_1-Ubuntu22.04-x64.tgz $TMP
+          pushd $TMP
+          tar xvfz *.tgz
+          rm *.tgz
+          ls -l icu/usr/local/lib
+          popd
+          echo "ICU_ROOT=/tmp/icu/icu/usr/local" >> $GITHUB_ENV
         elif [[ "${{ matrix.os }}" == "macos-latest" ]]; then
             brew list icu4c || brew install icu4c
             echo "ICU_ROOT=$(brew --prefix icu4c)" >> $GITHUB_ENV
diff --git a/inflection/cmake/versions.mk b/inflection/cmake/versions.mk
index 76b1f2ff..6fa1f3fa 100644
--- a/inflection/cmake/versions.mk
+++ b/inflection/cmake/versions.mk
@@ -3,5 +3,5 @@
 #
 CATCH2_VERSION := 3.8.0
 CF_VERSION := 5.10.1
-ICU_VERSION_MINIMUM := 74.2
+ICU_VERSION_MINIMUM := 77.1
 MARISA_VERSION := 0.2.6