diff --git a/firewall_rules.go b/firewall_rules.go
index 8503272f6..c3fc94292 100644
--- a/firewall_rules.go
+++ b/firewall_rules.go
@@ -17,8 +17,8 @@ const (
 
 // NetworkAddresses are arrays of ipv4 and v6 addresses
 type NetworkAddresses struct {
-	IPv4 []string `json:"ipv4"`
-	IPv6 []string `json:"ipv6"`
+	IPv4 []string `json:"ipv4,omitempty"`
+	IPv6 []string `json:"ipv6,omitempty"`
 }
 
 // A FirewallRule is a whitelist of ports, protocols, and addresses for which traffic should be allowed.
diff --git a/test/integration/firewall_rules_test.go b/test/integration/firewall_rules_test.go
index 1f6a816c2..1c3751539 100644
--- a/test/integration/firewall_rules_test.go
+++ b/test/integration/firewall_rules_test.go
@@ -53,10 +53,10 @@ func TestUpdateFirewallRules(t *testing.T) {
 				Protocol: "TCP",
 				Addresses: linodego.NetworkAddresses{
 					IPv4: []string{"0.0.0.0/0"},
-					IPv6: []string{"::0/0"},
 				},
 			},
 		},
+		Outbound: []linodego.FirewallRule{},
 	}
 
 	if _, err := client.UpdateFirewallRules(context.Background(), firewall.ID, newRules); err != nil {
diff --git a/test/integration/fixtures/TestUpdateFirewallRules.yaml b/test/integration/fixtures/TestUpdateFirewallRules.yaml
index 30da3ec38..e0a9b843d 100644
--- a/test/integration/fixtures/TestUpdateFirewallRules.yaml
+++ b/test/integration/fixtures/TestUpdateFirewallRules.yaml
@@ -2,7 +2,7 @@
 version: 1
 interactions:
 - request:
-    body: '{"label":"label","rules":{"inbound":[{"ports":"22","protocol":"TCP","addresses":{"ipv4":["10.20.30.40/0"],"ipv6":["1234::5678/0"]}}],"outbound":[{"ports":"22","protocol":"TCP","addresses":{"ipv4":["10.20.30.40/0"],"ipv6":["1234::5678/0"]}}]},"tags":["testing"],"devices":{}}'
+    body: '{"label":"label","rules":{"inbound":[{"ports":"22","protocol":"TCP","addresses":{"ipv4":["0.0.0.0/0"],"ipv6":["1234::5678/0"]}}],"outbound":[{"ports":"22","protocol":"TCP","addresses":{"ipv4":["0.0.0.0/0"],"ipv6":["1234::5678/0"]}}]},"tags":["testing"],"devices":{}}'
     form: {}
     headers:
       Accept:
@@ -10,15 +10,11 @@ interactions:
       Content-Type:
       - application/json
       User-Agent:
-      - linodego 0.12.0 https://github.com/linode/linodego
+      - linodego https://github.com/linode/linodego
     url: https://api.linode.com/v4beta/networking/firewalls
     method: POST
   response:
-    body: '{"id": 223, "label": "label", "created": "2018-01-02T03:04:05", "updated":
-      "2018-01-02T03:04:05", "status": "enabled", "rules": {"inbound": [{"ports":
-      "22", "protocol": "TCP", "addresses": {"ipv4": ["10.20.30.40/0"], "ipv6": ["1234::5678/0"]}}],
-      "outbound": [{"ports": "22", "protocol": "TCP", "addresses": {"ipv4": ["10.20.30.40/0"],
-      "ipv6": ["1234::5678/0"]}}]}, "tags": ["testing"]}'
+    body: '{"id": 2403, "label": "label", "created": "2018-01-02T03:04:05", "updated": "2018-01-02T03:04:05", "status": "enabled", "rules": {"inbound": [{"ports": "22", "protocol": "TCP", "addresses": {"ipv4": ["0.0.0.0/0"], "ipv6": ["1234::5678/0"]}}], "outbound": [{"ports": "22", "protocol": "TCP", "addresses": {"ipv4": ["0.0.0.0/0"], "ipv6": ["1234::5678/0"]}}]}, "tags": ["testing"]}'
     headers:
       Access-Control-Allow-Credentials:
       - "true"
@@ -33,15 +29,11 @@ interactions:
       Cache-Control:
       - private, max-age=60, s-maxage=60
       Content-Length:
-      - "363"
+      - "362"
       Content-Security-Policy:
       - default-src 'none'
       Content-Type:
       - application/json
-      Date:
-      - Tue, 19 May 2020 16:41:15 GMT
-      Retry-After:
-      - "92"
       Server:
       - nginx
       Strict-Transport-Security:
@@ -58,20 +50,14 @@ interactions:
       X-Oauth-Scopes:
       - '*'
       X-Ratelimit-Limit:
-      - "1600"
-      X-Ratelimit-Remaining:
-      - "1595"
-      X-Ratelimit-Reset:
-      - "1589906568"
-      X-Spec-Version:
-      - 4.65.1
+      - "800"
       X-Xss-Protection:
       - 1; mode=block
     status: 200 OK
     code: 200
     duration: ""
 - request:
-    body: '{"inbound":[{"ports":"22","protocol":"TCP","addresses":{"ipv4":["10.20.30.40/0"],"ipv6":["1234::5678/0"]}}]}'
+    body: '{"inbound":[{"ports":"22","protocol":"TCP","addresses":{"ipv4":["0.0.0.0/0"]}}]}'
     form: {}
     headers:
       Accept:
@@ -79,12 +65,11 @@ interactions:
       Content-Type:
       - application/json
       User-Agent:
-      - linodego 0.12.0 https://github.com/linode/linodego
-    url: https://api.linode.com/v4beta/networking/firewalls/223/rules
+      - linodego https://github.com/linode/linodego
+    url: https://api.linode.com/v4beta/networking/firewalls/2403/rules
     method: PUT
   response:
-    body: '{"inbound": [{"ports": "22", "protocol": "TCP", "addresses": {"ipv4": ["10.20.30.40/0"],
-      "ipv6": ["1234::5678/0"]}}]}'
+    body: '{"inbound": [{"ports": "22", "protocol": "TCP", "addresses": {"ipv4": ["0.0.0.0/0"]}}], "outbound": []}'
     headers:
       Access-Control-Allow-Credentials:
       - "true"
@@ -99,15 +84,11 @@ interactions:
       Cache-Control:
       - private, max-age=60, s-maxage=60
       Content-Length:
-      - "106"
+      - "103"
       Content-Security-Policy:
       - default-src 'none'
       Content-Type:
       - application/json
-      Date:
-      - Tue, 19 May 2020 16:41:15 GMT
-      Retry-After:
-      - "92"
       Server:
       - nginx
       Strict-Transport-Security:
@@ -124,13 +105,7 @@ interactions:
       X-Oauth-Scopes:
       - '*'
       X-Ratelimit-Limit:
-      - "1600"
-      X-Ratelimit-Remaining:
-      - "1594"
-      X-Ratelimit-Reset:
-      - "1589906568"
-      X-Spec-Version:
-      - 4.65.1
+      - "800"
       X-Xss-Protection:
       - 1; mode=block
     status: 200 OK
@@ -145,12 +120,11 @@ interactions:
       Content-Type:
       - application/json
       User-Agent:
-      - linodego 0.12.0 https://github.com/linode/linodego
-    url: https://api.linode.com/v4beta/networking/firewalls/223/rules
+      - linodego https://github.com/linode/linodego
+    url: https://api.linode.com/v4beta/networking/firewalls/2403/rules
     method: GET
   response:
-    body: '{"inbound": [{"ports": "22", "protocol": "TCP", "addresses": {"ipv4": ["10.20.30.40/0"],
-      "ipv6": ["1234::5678/0"]}}]}'
+    body: '{"inbound": [{"ports": "22", "protocol": "TCP", "addresses": {"ipv4": ["0.0.0.0/0"]}}], "outbound": []}'
     headers:
       Access-Control-Allow-Credentials:
       - "true"
@@ -166,15 +140,11 @@ interactions:
       - private, max-age=0, s-maxage=0, no-cache, no-store
       - private, max-age=60, s-maxage=60
       Content-Length:
-      - "106"
+      - "103"
       Content-Security-Policy:
       - default-src 'none'
       Content-Type:
       - application/json
-      Date:
-      - Tue, 19 May 2020 16:41:16 GMT
-      Retry-After:
-      - "92"
       Server:
       - nginx
       Strict-Transport-Security:
@@ -192,13 +162,7 @@ interactions:
       X-Oauth-Scopes:
       - '*'
       X-Ratelimit-Limit:
-      - "1600"
-      X-Ratelimit-Remaining:
-      - "1593"
-      X-Ratelimit-Reset:
-      - "1589906569"
-      X-Spec-Version:
-      - 4.65.1
+      - "800"
       X-Xss-Protection:
       - 1; mode=block
     status: 200 OK
@@ -213,8 +177,8 @@ interactions:
       Content-Type:
       - application/json
       User-Agent:
-      - linodego 0.12.0 https://github.com/linode/linodego
-    url: https://api.linode.com/v4beta/networking/firewalls/223
+      - linodego https://github.com/linode/linodego
+    url: https://api.linode.com/v4beta/networking/firewalls/2403
     method: DELETE
   response:
     body: '{}'
@@ -237,10 +201,6 @@ interactions:
       - default-src 'none'
       Content-Type:
       - application/json
-      Date:
-      - Tue, 19 May 2020 16:41:16 GMT
-      Retry-After:
-      - "91"
       Server:
       - nginx
       Strict-Transport-Security:
@@ -257,13 +217,7 @@ interactions:
       X-Oauth-Scopes:
       - '*'
       X-Ratelimit-Limit:
-      - "1600"
-      X-Ratelimit-Remaining:
-      - "1592"
-      X-Ratelimit-Reset:
-      - "1589906568"
-      X-Spec-Version:
-      - 4.65.1
+      - "800"
       X-Xss-Protection:
       - 1; mode=block
     status: 200 OK