diff --git a/src/tox_lsr/config_files/tox-default.ini b/src/tox_lsr/config_files/tox-default.ini
index 80bd726..3369175 100644
--- a/src/tox_lsr/config_files/tox-default.ini
+++ b/src/tox_lsr/config_files/tox-default.ini
@@ -488,12 +488,13 @@ allowlist_externals = podman
     bash
     cat
     rm
+    sed
 setenv =
     {[testenv]setenv}
 commands = bash {lsr_scriptdir}/setup_module_utils.sh
     {[lsr_config]commands_pre}
     # Remove badges from README.md
-    sed -i '1,8 {/^\[\!.*actions\/workflows/d}' README.md
+    sed -i "1,8 \{/^\\\[\!.*actions\/workflows/d\}" README.md
     {env:LSR_CONTAINER_RUNTIME:podman} run --rm --privileged \
       -v {toxinidir}:/workdir --workdir /workdir \
       docker://pandoc/core:latest \
diff --git a/tests/fixtures/test_tox_merge_ini/result.ini b/tests/fixtures/test_tox_merge_ini/result.ini
index 77ba19f..bfd437c 100644
--- a/tests/fixtures/test_tox_merge_ini/result.ini
+++ b/tests/fixtures/test_tox_merge_ini/result.ini
@@ -393,10 +393,11 @@ allowlist_externals = podman
 	bash
 	cat
 	rm
+	sed
 setenv = {[testenv]setenv}
 commands = bash {lsr_scriptdir}/setup_module_utils.sh
 	{[lsr_config]commands_pre}
-	sed -i '1,8 {/^\[\!.*actions\/workflows/d}' README.md
+	sed -i "1,8 \{/^\\\[\!.*actions\/workflows/d\}" README.md
 	{env:LSR_CONTAINER_RUNTIME:podman} run --rm --privileged \
 	-v {toxinidir}:/workdir --workdir /workdir \
 	docker://pandoc/core:latest \