diff --git a/examples/complex-etcd/main.go b/examples/complex-etcd/main.go
index 795dfc6c..efdca4c9 100644
--- a/examples/complex-etcd/main.go
+++ b/examples/complex-etcd/main.go
@@ -70,7 +70,10 @@ func main() {
 		Prefix:      false,
 		Key:         "single_key",
 	}
-	provider := etcd.Provider(providerCfg)
+	provider, err := etcd.Provider(providerCfg)
+	if err != nil {
+		log.Fatalf("Failed to instantiate etcd provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)
@@ -109,7 +112,10 @@ func main() {
 		Prefix:      true,
 		Key:         "parent",
 	}
-	provider = etcd.Provider(providerCfg)
+	provider, err = etcd.Provider(providerCfg)
+	if err != nil {
+		log.Fatalf("Failed to instantiate etcd provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)
@@ -154,7 +160,10 @@ func main() {
 		Key:         "child",
 	}
 
-	provider = etcd.Provider(providerCfg)
+	provider, err = etcd.Provider(providerCfg)
+	if err != nil {
+		log.Fatalf("Failed to instantiate etcd provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)
@@ -201,7 +210,10 @@ func main() {
 		Key:         "child",
 	}
 
-	provider = etcd.Provider(providerCfg)
+	provider, err = etcd.Provider(providerCfg)
+	if err != nil {
+		log.Fatalf("Failed to instantiate etcd provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)
@@ -241,7 +253,10 @@ func main() {
 		Key:         "child",
 	}
 
-	provider = etcd.Provider(providerCfg)
+	provider, err = etcd.Provider(providerCfg)
+	if err != nil {
+		log.Fatalf("Failed to instantiate etcd provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)
diff --git a/examples/read-appconfig/main.go b/examples/read-appconfig/main.go
index 4808e993..e2be5dc4 100644
--- a/examples/read-appconfig/main.go
+++ b/examples/read-appconfig/main.go
@@ -13,12 +13,16 @@ import (
 var k = koanf.New(".")
 
 func main() {
-	provider := appconfig.Provider(appconfig.Config{
+	provider, err := appconfig.Provider(appconfig.Config{
 		Application:   os.Getenv("AWS_APPCONFIG_APPLICATION"),
 		ClientID:      os.Getenv("AWS_APPCONFIG_CLIENT_ID"),
 		Configuration: os.Getenv("AWS_APPCONFIG_CONFIG_NAME"),
 		Environment:   os.Getenv("AWS_APPCONFIG_ENVIRONMENT"),
 	})
+	if err != nil {
+		log.Fatalf("Failed to instantiate appconfig provider: %v", err)
+	}
+
 	// Load the provider and parse configuration as JSON.
 	if err := k.Load(provider, json.Parser()); err != nil {
 		log.Fatalf("error loading config: %v", err)
diff --git a/examples/read-consul/main.go b/examples/read-consul/main.go
index d0acaa1a..5917ec04 100644
--- a/examples/read-consul/main.go
+++ b/examples/read-consul/main.go
@@ -54,12 +54,15 @@ func main() {
 		log.Printf("Couldn't put key.")
 	}
 
-	provider := consul.Provider(consul.Config{
+	provider, err := consul.Provider(consul.Config{
 		Key:      sKey,
 		Recurse:  false,
 		Detailed: false,
 		Cfg:      api.DefaultConfig(),
 	})
+	if err != nil {
+		log.Fatalf("Failed to instantiate consul provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)
@@ -91,12 +94,15 @@ func main() {
 		log.Fatalf("error loading config: %v", err)
 	}
 
-	provider = consul.Provider(consul.Config{
+	provider, err = consul.Provider(consul.Config{
 		Key:      "parent",
 		Recurse:  true,
 		Detailed: false,
 		Cfg:      api.DefaultConfig(),
 	})
+	if err != nil {
+		log.Fatalf("Failed to instantiate consul provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)
@@ -134,12 +140,15 @@ func main() {
 		log.Fatalf("error loading config: %v", err)
 	}
 
-	provider = consul.Provider(consul.Config{
+	provider, err = consul.Provider(consul.Config{
 		Key:      "child",
 		Recurse:  true,
 		Detailed: false,
 		Cfg:      api.DefaultConfig(),
 	})
+	if err != nil {
+		log.Fatalf("Failed to instantiate consul provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)
@@ -181,12 +190,15 @@ func main() {
 	sFlags := uint64(42)
 	sVal = "father"
 
-	provider = consul.Provider(consul.Config{
+	provider, err = consul.Provider(consul.Config{
 		Key:      sKey,
 		Recurse:  false,
 		Detailed: true,
 		Cfg:      api.DefaultConfig(),
 	})
+	if err != nil {
+		log.Fatalf("Failed to instantiate consul provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		fmt.Printf("error loading config: %v", err)
@@ -213,12 +225,15 @@ func main() {
 
 	sKey = "parent"
 
-	provider = consul.Provider(consul.Config{
+	provider, err = consul.Provider(consul.Config{
 		Key:      sKey,
 		Recurse:  true,
 		Detailed: true,
 		Cfg:      api.DefaultConfig(),
 	})
+	if err != nil {
+		log.Fatalf("Failed to instantiate consul provider: %v", err)
+	}
 
 	if err := kCheck.Load(provider, nil); err != nil {
 		fmt.Printf("error loading config: %v", err)
@@ -255,12 +270,15 @@ func main() {
 	// Watch test
 
 	sKey = "parent"
-	provider = consul.Provider(consul.Config{
+	provider, err = consul.Provider(consul.Config{
 		Key:      sKey,
 		Recurse:  true,
 		Detailed: false,
 		Cfg:      api.DefaultConfig(),
 	})
+	if err != nil {
+		log.Fatalf("Failed to instantiate consul provider: %v", err)
+	}
 
 	// Getting the old value
 	kCheck.Load(provider, nil)
diff --git a/examples/read-vault/main.go b/examples/read-vault/main.go
index c03442af..103abbe1 100644
--- a/examples/read-vault/main.go
+++ b/examples/read-vault/main.go
@@ -14,7 +14,7 @@ import (
 var k = koanf.New(".")
 
 func main() {
-	provider := vault.Provider(vault.Config{
+	provider, err := vault.Provider(vault.Config{
 		Address: os.Getenv("VAULT_ADDRESS"),
 		Token:   os.Getenv("VAULT_TOKEN"),
 		Path:    "secret/data/my-app",
@@ -25,6 +25,9 @@ func main() {
 		// k.String("data.YOUR_KEY") etc. instead of k.String("YOUR_KEY").
 		ExcludeMeta: true,
 	})
+	if err != nil {
+		log.Fatalf("Failed to instantiate vault provider: %v", err)
+	}
 	// Load mapped config from Vault storage.
 	if err := k.Load(provider, nil); err != nil {
 		log.Fatalf("error loading config: %v", err)