diff --git a/Dockerfile b/Dockerfile
index b647033..928947f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ MAINTAINER Frank Denis
 ENV SERIAL 1
 
 ENV BUILD_DEPS   make gcc musl-dev git ldns-dev libevent-dev expat-dev shadow autoconf file libexecinfo-dev
-ENV RUNTIME_DEPS libressl ldns ldns-tools libevent expat libtool libexecinfo coreutils drill
+ENV RUNTIME_DEPS libressl ldns ldns-tools libevent expat libtool libexecinfo coreutils drill findutils bash
 
 RUN set -x && \
     apk --update upgrade && apk add $RUNTIME_DEPS $BUILD_DEPS
diff --git a/dnscrypt-wrapper.sh b/dnscrypt-wrapper.sh
index 98ca1f2..c32e178 100755
--- a/dnscrypt-wrapper.sh
+++ b/dnscrypt-wrapper.sh
@@ -1,17 +1,17 @@
-#! /bin/sh
+#! /usr/bin/env bash
 
 KEYS_DIR="/opt/dnscrypt-wrapper/etc/keys"
 STKEYS_DIR="${KEYS_DIR}/short-term"
 
 prune() {
-    find "$STKEYS_DIR" -type f -cmin +1440 -exec rm -f {} \;
+    /usr/bin/find "$STKEYS_DIR" -type f -cmin +1440 -exec rm -f {} \;
 }
 
 rotation_needed() {
     if [ ! -f "${STKEYS_DIR}/dnscrypt.cert" ]; then
         echo true
     else
-        if [ $(find "$STKEYS_DIR" -type f -cmin -720 -print -quit | wc -l | sed 's/[^0-9]//g') -le 0 ]; then
+        if [ $(/usr/bin/find "$STKEYS_DIR" -type f -cmin -720 -print -quit | wc -l | sed 's/[^0-9]//g') -le 0 ]; then
             echo true
         else
             echo false
diff --git a/entrypoint.sh b/entrypoint.sh
index e02621e..3f969b1 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /usr/bin/env bash
 
 set -e
 
diff --git a/key-rotation.sh b/key-rotation.sh
index 4624ff3..5f67c66 100755
--- a/key-rotation.sh
+++ b/key-rotation.sh
@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /usr/bin/env bash
 
 sleep 1800
 
@@ -6,7 +6,7 @@ KEYS_DIR="/opt/dnscrypt-wrapper/etc/keys"
 STKEYS_DIR="${KEYS_DIR}/short-term"
 
 rotation_needed() {
-    if [ $(find "$STKEYS_DIR" -type f -cmin -720 -print -quit | wc -l | sed 's/[^0-9]//g') -le 0 ]; then
+    if [ $(/usr/bin/find "$STKEYS_DIR" -type f -cmin -720 -print -quit | wc -l | sed 's/[^0-9]//g') -le 0 ]; then
         echo true
     else
         echo false
diff --git a/unbound-check.sh b/unbound-check.sh
index ee25294..2273dae 100755
--- a/unbound-check.sh
+++ b/unbound-check.sh
@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /usr/bin/env bash
 
 drill  -DQ -p 553 NS . @127.0.0.1 && \
 drill -tDQ -p 553 NS . @127.0.0.1
diff --git a/unbound.sh b/unbound.sh
index 12d82cd..6cea2e7 100755
--- a/unbound.sh
+++ b/unbound.sh
@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /usr/bin/env bash
 
 KEYS_DIR="/opt/dnscrypt-wrapper/etc/keys"
 ZONES_DIR="/opt/unbound/etc/unbound/zones"
diff --git a/watchdog.sh b/watchdog.sh
index 6840445..1d3ed3b 100755
--- a/watchdog.sh
+++ b/watchdog.sh
@@ -1,4 +1,4 @@
-#! /bin/sh
+#! /usr/bin/env bash
 
 sleep 300