diff --git a/client/allocrunner/taskrunner/service_hook.go b/client/allocrunner/taskrunner/service_hook.go
index 956033f3f..02b8d75b7 100644
--- a/client/allocrunner/taskrunner/service_hook.go
+++ b/client/allocrunner/taskrunner/service_hook.go
@@ -63,16 +63,8 @@ func newServiceHook(c serviceHookConfig) *serviceHook {
 		delay:     c.task.ShutdownDelay,
 	}
 
-	// COMPAT(0.11): AllocatedResources was added in 0.9 so assume its set
-	//               in 0.11.
-	if c.alloc.AllocatedResources != nil {
-		if res := c.alloc.AllocatedResources.Tasks[c.task.Name]; res != nil {
-			h.networks = res.Networks
-		}
-	} else {
-		if res := c.alloc.TaskResources[c.task.Name]; res != nil {
-			h.networks = res.Networks
-		}
+	if res := c.alloc.AllocatedResources.Tasks[c.task.Name]; res != nil {
+		h.networks = res.Networks
 	}
 
 	if c.alloc.DeploymentStatus != nil && c.alloc.DeploymentStatus.Canary {
@@ -116,17 +108,9 @@ func (h *serviceHook) Update(ctx context.Context, req *interfaces.TaskUpdateRequ
 		canary = req.Alloc.DeploymentStatus.Canary
 	}
 
-	// COMPAT(0.11): AllocatedResources was added in 0.9 so assume its set
-	//               in 0.11.
 	var networks structs.Networks
-	if req.Alloc.AllocatedResources != nil {
-		if res := req.Alloc.AllocatedResources.Tasks[h.taskName]; res != nil {
-			networks = res.Networks
-		}
-	} else {
-		if res := req.Alloc.TaskResources[h.taskName]; res != nil {
-			networks = res.Networks
-		}
+	if res := req.Alloc.AllocatedResources.Tasks[h.taskName]; res != nil {
+		networks = res.Networks
 	}
 
 	task := req.Alloc.LookupTask(h.taskName)
diff --git a/client/allocrunner/taskrunner/task_runner.go b/client/allocrunner/taskrunner/task_runner.go
index 9f6e5ac34..506a3aca9 100644
--- a/client/allocrunner/taskrunner/task_runner.go
+++ b/client/allocrunner/taskrunner/task_runner.go
@@ -301,23 +301,7 @@ func NewTaskRunner(config *Config) (*TaskRunner, error) {
 		}
 		tr.taskResources = tres
 	} else {
-		// COMPAT(0.11): Upgrade from 0.8 resources to 0.9+ resources
-		// Grab the old task resources
-		oldTr, ok := tr.alloc.TaskResources[tr.taskName]
-		if !ok {
-			return nil, fmt.Errorf("no task resources found on allocation")
-		}
-
-		// Convert the old to new
-		tr.taskResources = &structs.AllocatedTaskResources{
-			Cpu: structs.AllocatedCpuResources{
-				CpuShares: int64(oldTr.CPU),
-			},
-			Memory: structs.AllocatedMemoryResources{
-				MemoryMB: int64(oldTr.MemoryMB),
-			},
-			Networks: oldTr.Networks,
-		}
+		return nil, fmt.Errorf("no task resources found on allocation")
 	}
 
 	// Build the restart tracker.
@@ -1253,15 +1237,9 @@ func (tr *TaskRunner) UpdateStats(ru *cstructs.TaskResourceUsage) {
 func (tr *TaskRunner) setGaugeForMemory(ru *cstructs.TaskResourceUsage) {
 	alloc := tr.Alloc()
 	var allocatedMem float32
-	if alloc.AllocatedResources != nil {
-		if taskRes := alloc.AllocatedResources.Tasks[tr.taskName]; taskRes != nil {
-			// Convert to bytes to match other memory metrics
-			allocatedMem = float32(taskRes.Memory.MemoryMB) * 1024 * 1024
-		}
-	} else if taskRes := alloc.TaskResources[tr.taskName]; taskRes != nil {
-		// COMPAT(0.11) Remove in 0.11 when TaskResources is removed
-		allocatedMem = float32(taskRes.MemoryMB) * 1024 * 1024
-
+	if taskRes := alloc.AllocatedResources.Tasks[tr.taskName]; taskRes != nil {
+		// Convert to bytes to match other memory metrics
+		allocatedMem = float32(taskRes.Memory.MemoryMB) * 1024 * 1024
 	}
 
 	if !tr.clientConfig.DisableTaggedMetrics {
@@ -1303,13 +1281,8 @@ func (tr *TaskRunner) setGaugeForMemory(ru *cstructs.TaskResourceUsage) {
 func (tr *TaskRunner) setGaugeForCPU(ru *cstructs.TaskResourceUsage) {
 	alloc := tr.Alloc()
 	var allocatedCPU float32
-	if alloc.AllocatedResources != nil {
-		if taskRes := alloc.AllocatedResources.Tasks[tr.taskName]; taskRes != nil {
-			allocatedCPU = float32(taskRes.Cpu.CpuShares)
-		}
-	} else if taskRes := alloc.TaskResources[tr.taskName]; taskRes != nil {
-		// COMPAT(0.11) Remove in 0.11 when TaskResources is removed
-		allocatedCPU = float32(taskRes.CPU)
+	if taskRes := alloc.AllocatedResources.Tasks[tr.taskName]; taskRes != nil {
+		allocatedCPU = float32(taskRes.Cpu.CpuShares)
 	}
 
 	if !tr.clientConfig.DisableTaggedMetrics {
diff --git a/client/taskenv/env.go b/client/taskenv/env.go
index 57402b442..0be24d63f 100644
--- a/client/taskenv/env.go
+++ b/client/taskenv/env.go
@@ -603,7 +603,6 @@ func (b *Builder) setAlloc(alloc *structs.Allocation) *Builder {
 
 	tg := alloc.Job.LookupTaskGroup(alloc.TaskGroup)
 
-	// COMPAT(0.11): Remove in 0.11
 	b.otherPorts = make(map[string]string, len(tg.Tasks)*2)
 	if alloc.AllocatedResources != nil {
 		// Populate task resources
@@ -645,30 +644,6 @@ func (b *Builder) setAlloc(alloc *structs.Allocation) *Builder {
 				addGroupPort(b.otherPorts, p)
 			}
 		}
-	} else if alloc.TaskResources != nil {
-		if tr, ok := alloc.TaskResources[b.taskName]; ok {
-			// Copy networks to prevent sharing
-			b.networks = make([]*structs.NetworkResource, len(tr.Networks))
-			for i, n := range tr.Networks {
-				b.networks[i] = n.Copy()
-			}
-
-		}
-
-		for taskName, resources := range alloc.TaskResources {
-			// Add ports from other tasks
-			if taskName == b.taskName {
-				continue
-			}
-			for _, nw := range resources.Networks {
-				for _, p := range nw.ReservedPorts {
-					addPort(b.otherPorts, taskName, nw.IP, p.Label, p.Value)
-				}
-				for _, p := range nw.DynamicPorts {
-					addPort(b.otherPorts, taskName, nw.IP, p.Label, p.Value)
-				}
-			}
-		}
 	}
 
 	upstreams := []structs.ConsulUpstream{}
diff --git a/client/taskenv/env_test.go b/client/taskenv/env_test.go
index f68bb05d7..035291436 100644
--- a/client/taskenv/env_test.go
+++ b/client/taskenv/env_test.go
@@ -266,6 +266,10 @@ func TestEnvironment_AsList_Old(t *testing.T) {
 			},
 		},
 	}
+
+	// simulate canonicalization on restore or fetch
+	a.Canonicalize()
+
 	task := a.Job.TaskGroups[0].Tasks[0]
 	task.Env = map[string]string{
 		"taskEnvKey": "taskEnvVal",