diff --git a/certs/ocsp/ocspd0.sh b/certs/ocsp/ocspd0.sh
index e0f978773..d0aa0b953 100755
--- a/certs/ocsp/ocspd0.sh
+++ b/certs/ocsp/ocspd0.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 openssl ocsp -port 22220 -nmin 1                \
     -index   certs/ocsp/index0.txt              \
diff --git a/certs/ocsp/ocspd1.sh b/certs/ocsp/ocspd1.sh
index da6babcaa..91448c004 100755
--- a/certs/ocsp/ocspd1.sh
+++ b/certs/ocsp/ocspd1.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 openssl ocsp -port 22221 -nmin 1                  \
     -index   certs/ocsp/index1.txt                \
diff --git a/certs/ocsp/ocspd2.sh b/certs/ocsp/ocspd2.sh
index 3539f38fd..a7748b337 100755
--- a/certs/ocsp/ocspd2.sh
+++ b/certs/ocsp/ocspd2.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 openssl ocsp -port 22222 -nmin 1                  \
     -index   certs/ocsp/index2.txt                \
diff --git a/certs/ocsp/ocspd3.sh b/certs/ocsp/ocspd3.sh
index 35130c253..3e53ceb71 100755
--- a/certs/ocsp/ocspd3.sh
+++ b/certs/ocsp/ocspd3.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 openssl ocsp -port 22223 -nmin 1                  \
     -index   certs/ocsp/index3.txt                \
diff --git a/certs/ocsp/renewcerts.sh b/certs/ocsp/renewcerts.sh
index 4eb552b42..cdbabdf81 100755
--- a/certs/ocsp/renewcerts.sh
+++ b/certs/ocsp/renewcerts.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 openssl req                \
     -new                   \
     -key  root-ca-key.pem  \