diff --git a/.github/workflows/ci-post-merge.yml b/.github/workflows/ci-post-merge.yml
index 40829d8ef..8d509d691 100644
--- a/.github/workflows/ci-post-merge.yml
+++ b/.github/workflows/ci-post-merge.yml
@@ -30,6 +30,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install nasm
+        if: matrix.target.os == 'windows-latest'
+        uses: ilammy/setup-nasm@v1.5.1
+
       - name: Install OpenSSL
         if: matrix.target.os == 'windows-latest'
         shell: bash
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c1d959fbf..56333e187 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install nasm
+        if: matrix.target.os == 'windows-latest'
+        uses: ilammy/setup-nasm@v1.5.1
+
       - name: Install OpenSSL
         if: matrix.target.os == 'windows-latest'
         shell: bash