diff --git a/example.config.yml b/example.config.yml
index 0be663d..ad5be86 100644
--- a/example.config.yml
+++ b/example.config.yml
@@ -2,6 +2,8 @@
 # Working directory where HPL and associated applications will be compiled.
 hpl_root: /opt/top500
 
+mpich_version: "4.1.2"
+
 # Linear algebra library options.
 linear_algebra_library: blis  # 'atlas', 'openblas', or 'blis'
 linear_algebra_blis_version: master  # only used for blis
diff --git a/main.yml b/main.yml
index 67b74f5..faea15a 100644
--- a/main.yml
+++ b/main.yml
@@ -35,15 +35,15 @@
 
     - name: Download MPI (Message Passing Interface).
       ansible.builtin.unarchive:
-        src: https://www.mpich.org/static/downloads/3.4.2/mpich-3.4.2.tar.gz
+        src: https://www.mpich.org/static/downloads/{{ mpich_version }}/mpich-{{ mpich_version }}.tar.gz
         dest: "{{ hpl_root }}/tmp"
         remote_src: true
-        creates: "{{ hpl_root }}/tmp/mpich-3.4.2/README"
+        creates: "{{ hpl_root }}/tmp/mpich-{{ mpich_version }}/README"
 
     - name: Build MPI (takes a while).
       ansible.builtin.command: "{{ item }}"
       args:
-        chdir: "{{ hpl_root }}/tmp/mpich-3.4.2"
+        chdir: "{{ hpl_root }}/tmp/mpich-{{ mpich_version }}"
         creates: "{{ hpl_root }}/tmp/COMPILE_MPI_COMPLETE"
       loop:
         - ./configure --with-device=ch3:sock FFLAGS=-fallow-argument-mismatch
@@ -52,7 +52,7 @@
     - name: Install MPI.
       ansible.builtin.command: make install
       args:
-        chdir: "{{ hpl_root }}/tmp/mpich-3.4.2"
+        chdir: "{{ hpl_root }}/tmp/mpich-{{ mpich_version }}"
         creates: "{{ hpl_root }}/tmp/COMPILE_MPI_COMPLETE"
       become: true