diff --git a/bin/install-kafka.sh b/bin/install-kafka.sh
index 975c858..3e8703d 100755
--- a/bin/install-kafka.sh
+++ b/bin/install-kafka.sh
@@ -1,57 +1,55 @@
 #!/usr/bin/env bash
 
 set -xe
 
 SCALA_VERSION=2.12
 KAFKA_VERSION=2.1.1
 KAFKA_APP="kafka_${SCALA_VERSION}-${KAFKA_VERSION}"
 TARBALL="${KAFKA_APP}.tgz"
 CHECKSUMS="${TARBALL}.sha512"
 KAFKA_ROOT_DIR=swh/journal/tests
 KAFKA_DIR="${KAFKA_ROOT_DIR}/${KAFKA_APP}"
 KAFKA_LINK="${KAFKA_ROOT_DIR}/kafka"
 URL="http://apache.mirrors.ovh.net/ftp.apache.org/dist/kafka/${KAFKA_VERSION}/${TARBALL}"
 KAFKA_CHECKSUM=a2e8168e8de6b45e8fca1f2883f0744d3c5a939b70d8a47a5428b72188501d4c2fc11bc35759f2392680d4e8ecf2fa9d0e518e77fd28393afba22194ad018b10
 
 case $1 in
     "install")
-	echo "Kafka installation started."
-
+        echo "Kafka installation started."
         if [ ! -f $TARBALL ]; then
-          echo "Kafka download"
-          wget $URL
-          echo "${KAFKA_CHECKSUM}  ${TARBALL}" > $CHECKSUMS
-          sha512sum -c $CHECKSUMS
+            echo "Kafka download"
+            wget $URL
+            echo "${KAFKA_CHECKSUM}  ${TARBALL}" > $CHECKSUMS
+            sha512sum -c $CHECKSUMS
 
-          if [ $? -ne 0 ]; then
-            echo "Kafka download: failed to retrieve ${TARBALL}";
-            exit 1
-          fi
-          echo "Kafka download done"
+            if [ $? -ne 0 ]; then
+                echo "Kafka download: failed to retrieve ${TARBALL}";
+                exit 1
+            fi
+            echo "Kafka download done"
         fi
 
         if [ ! -d $KAFKA_DIR ]; then
-          echo "Kafka extraction"
-
-          tar xvf $TARBALL -C $KAFKA_ROOT_DIR
-          pushd $KAFKA_ROOT_DIR && ln -nsf $KAFKA_APP kafka && popd
-          echo "Kafka extraction done"
+            echo "Kafka extraction"
+            tar xvf $TARBALL -C $KAFKA_ROOT_DIR
+            pushd $KAFKA_ROOT_DIR && ln -nsf $KAFKA_APP kafka && popd
+            echo "Kafka extraction done"
         fi
-	echo "Kafka installation done. Kafka is installed at $KAFKA_DIR"
-	;;
+        echo "Kafka installation done. Kafka is installed at $KAFKA_DIR"
+        ;;
     "clean")
-	echo "Kafka cleanup started."
-	[ -d $KAFKA_DIR ] && rm -rf $KAFKA_DIR
-	[ -L $KAFKA_LINK ] && rm $KAFKA_LINK
-	echo "Kafka cleanup done."
-	;;
+        echo "Kafka cleanup started."
+        [ -d $KAFKA_DIR ] && rm -rf $KAFKA_DIR
+        [ -L $KAFKA_LINK ] && rm $KAFKA_LINK
+        echo "Kafka cleanup done."
+        ;;
     "clean-cache")
-	echo "Kafka cleanup cache started."
-	[ -f $TARBALL ] && rm $TARBALL
-	[ -f $CHECKSUMS ] && rm $CHECKSUMS
-	echo "Kafka cleanup cache done."
-	;;
+        echo "Kafka cleanup cache started."
+        [ -f $TARBALL ] && rm $TARBALL
+        [ -f $CHECKSUMS ] && rm $CHECKSUMS
+        echo "Kafka cleanup cache done."
+        ;;
     *)
-	echo "Unknown command, do nothing"
-	exit 1;
+        echo "Unknown command, do nothing"
+        exit 1;
 esac