diff --git a/Dockerfile b/Dockerfile
index 9c0f6ab..70416ae 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.5
+FROM alpine:3.8
 
 # Install packges needed
 RUN apk --no-cache add ca-certificates curl bash jq py2-pip && \
diff --git a/ecs-deploy b/ecs-deploy
index 36925af..142f5bd 100755
--- a/ecs-deploy
+++ b/ecs-deploy
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 # Setup default values for variables
-VERSION="3.4.0"
+VERSION="3.7.0"
 CLUSTER=false
 SERVICE=false
 TASK_DEFINITION=false
@@ -206,6 +206,10 @@ function parseImageName() {
         fi
       else
         tag=${BASH_REMATCH[1]}
+        domain=""
+        port=""
+        repo=""
+        img=""
       fi
     else
       # check if using root level repo with format like mariadb or mariadb:latest
@@ -217,6 +221,12 @@ function parseImageName() {
           exit 12
         fi
         tag=${BASH_REMATCH[2]}
+
+        # for root level repo, initialize unused variables for checks when rebuilding image below
+        domain=""
+        port=""
+        repo=""
+
       else
         echo "Unable to parse image name: $IMAGE, check the format and try again"
         exit 13
@@ -236,28 +246,27 @@ function parseImageName() {
     fi
 
     # Reassemble image name
+    useImage=""
     if [[ "x$TAGONLY" == "x" ]]; then
 
-      if [[ ! -z ${domain+undefined-guard} ]]; then
+      if [[ ! -z "$domain" ]]; then
         useImage="$domain"
       fi
-      if [[ ! -z ${port} ]]; then
+      if [[ ! -z "$port" ]]; then
         useImage="$useImage:$port"
       fi
-      if [[ ! -z ${repo+undefined-guard} ]]; then
-       if [[ ! "x$repo" == "x" ]]; then
+      if [[ ! -z "$repo" ]]; then
         useImage="$useImage/$repo"
-       fi
       fi
-      if [[ ! -z ${img+undefined-guard} ]]; then
-        if [[ "x$useImage" == "x" ]]; then
+      if [[ ! -z "$img" ]]; then
+        if [[ -z "$useImage" ]]; then
           useImage="$img"
         else
           useImage="$useImage/$img"
         fi
       fi
       imageWithoutTag="$useImage"
-      if [[ ! -z ${tag+undefined-guard} ]]; then
+      if [[ ! -z "$tag" ]]; then
         useImage="$useImage:$tag"
       fi
 
@@ -313,7 +322,7 @@ function createNewTaskDefJson() {
 
     # Some options in task definition should only be included in new definition if present in
     # current definition. If found in current definition, append to JQ filter.
-    CONDITIONAL_OPTIONS=(networkMode taskRoleArn placementConstraints)
+    CONDITIONAL_OPTIONS=(networkMode taskRoleArn placementConstraints executionRoleArn)
     for i in "${CONDITIONAL_OPTIONS[@]}"; do
       re=".*${i}.*"
       if [[ "$DEF" =~ $re ]]; then
@@ -323,7 +332,7 @@ function createNewTaskDefJson() {
 
     # Updated jq filters for AWS Fargate
     REQUIRES_COMPATIBILITIES=$(echo "${DEF}" | jq -r '. | select(.requiresCompatibilities != null) | .requiresCompatibilities[]')
-    if [[ "${REQUIRES_COMPATIBILITIES}" == 'FARGATE' ]]; then
+    if `echo ${REQUIRES_COMPATIBILITIES[@]} | grep -q "FARGATE"`; then
       FARGATE_JQ_FILTER='executionRoleArn: .executionRoleArn, requiresCompatibilities: .requiresCompatibilities, cpu: .cpu, memory: .memory'
       NEW_DEF_JQ_FILTER="${NEW_DEF_JQ_FILTER}, ${FARGATE_JQ_FILTER}"
     fi
diff --git a/test.bats b/test.bats
index 6fd9fec..8467e38 100755
--- a/test.bats
+++ b/test.bats
@@ -279,7 +279,7 @@ EOF
   expected='{ "family": "app-task-def", "volumes": [], "containerDefinitions": [ { "environment": [ { "name": "KEY", "value": "value * " } ], "name": "API", "links": [], "mountPoints": [], "image": "121212345678.dkr.ecr.us-east-1.amazonaws.com/acct/repo:1111111111", "essential": true, "portMappings": [ { "protocol": "tcp", "containerPort": 80, "hostPort": 10080 } ], "entryPoint": [], "memory": 128, "command": [ "/data/run.sh" ], "cpu": 200, "volumesFrom": [] } ], "placementConstraints": null, "networkMode": "bridge" }'
   run createNewTaskDefJson
   [ ! -z $status ]
-  [ $(echo "$output" | jq) == $(echo "$expected" | jq) ]
+  [ "$(echo "$output" | jq .)" == "$(echo "$expected" | jq .)" ]
 }
 
 @test "test createNewTaskDefJson with single container in definition for AWS Fargate" {
@@ -345,7 +345,7 @@ EOF
   expected='{ "family": "app-task-def", "volumes": [], "containerDefinitions": [ { "environment": [ { "name": "KEY", "value": "value" } ], "name": "API", "links": [], "mountPoints": [], "image": "121212345678.dkr.ecr.us-east-1.amazonaws.com/acct/repo:1111111111", "essential": true, "portMappings": [ { "protocol": "tcp", "containerPort": 80, "hostPort": 10080 } ], "entryPoint": [], "memory": 128, "command": [ "/data/run.sh" ], "cpu": 200, "volumesFrom": [] } ], "placementConstraints": null, "networkMode": "awsvpc", "executionRoleArn": "arn:aws:iam::121212345678:role/ecsTaskExecutionRole", "requiresCompatibilities": [ "FARGATE" ], "cpu": "256", "memory": "512" }'
   run createNewTaskDefJson
   [ ! -z $status ]
-  [ $(echo "$output" | jq) == $(echo "$expected" | jq) ]
+  [ "$(echo "$output" | jq .)" == "$(echo "$expected" | jq .)" ]
 }
 
 @test "test createNewTaskDefJson with multiple containers in definition" {
@@ -429,7 +429,7 @@ EOF
   expected='{ "family": "app-task-def", "volumes": [], "containerDefinitions": [ { "environment": [ { "name": "KEY", "value": "value" } ], "name": "API", "links": [], "mountPoints": [], "image": "121212345678.dkr.ecr.us-east-1.amazonaws.com/acct/repo:1111111111", "essential": true, "portMappings": [ { "protocol": "tcp", "containerPort": 80, "hostPort": 10080 } ], "entryPoint": [], "memory": 128, "command": [ "/data/run.sh" ], "cpu": 200, "volumesFrom": [] }, { "environment": [ { "name": "KEY", "value": "value" } ], "name": "cache", "links": [], "mountPoints": [], "image": "redis:latest", "essential": true, "portMappings": [ { "protocol": "tcp", "containerPort": 6376, "hostPort": 10376 } ], "entryPoint": [], "memory": 128, "command": [ "/data/run.sh" ], "cpu": 200, "volumesFrom": [] } ], "placementConstraints": null, "networkMode": "bridge" }'
   run createNewTaskDefJson
   [ ! -z $status ]
-  [ $(echo "$output" | jq) == $(echo "$expected" | jq) ]
+  [ "$(echo "$output" | jq .)" == "$(echo "$expected" | jq .)" ]
 }
 
 @test "test parseImageName with tagonly option" {
@@ -441,7 +441,7 @@ EOF
   run parseImageName
 
   [ ! -z $status ]
-  [ $(echo "$output" | jq) == $(echo "$expected" | jq) ]
+  [ "$(echo "$output" | jq .)" == "$(echo "$expected" | jq .)" ]
 }
 
 @test "test createNewTaskDefJson with multiple containers in definition and replace only tags" {
@@ -527,5 +527,5 @@ EOF
   run createNewTaskDefJson
   echo $output
   [ ! -z $status ]
-  [ $(echo "$output" | jq) == $(echo "$expected" | jq) ]
+  [ "$(echo "$output" | jq .)" == "$(echo "$expected" | jq .)" ]
 }