diff --git a/providers/dns/dnspod/dnspod.go b/providers/dns/dnspod/dnspod.go
index 8a1d75ff..fa21872b 100644
--- a/providers/dns/dnspod/dnspod.go
+++ b/providers/dns/dnspod/dnspod.go
@@ -42,7 +42,7 @@ func NewDefaultConfig() *Config {
 		PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
 		PollingInterval:    env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
 		HTTPClient: &http.Client{
-			Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30),
+			Timeout: env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
 		},
 	}
 }
diff --git a/providers/dns/vultr/vultr.go b/providers/dns/vultr/vultr.go
index 4ea20dc7..d658be49 100644
--- a/providers/dns/vultr/vultr.go
+++ b/providers/dns/vultr/vultr.go
@@ -44,7 +44,7 @@ func NewDefaultConfig() *Config {
 		TTL:                env.GetOrDefaultInt(EnvTTL, dns01.DefaultTTL),
 		PropagationTimeout: env.GetOrDefaultSecond(EnvPropagationTimeout, dns01.DefaultPropagationTimeout),
 		PollingInterval:    env.GetOrDefaultSecond(EnvPollingInterval, dns01.DefaultPollingInterval),
-		HTTPTimeout:        env.GetOrDefaultSecond(EnvHTTPTimeout, 30),
+		HTTPTimeout:        env.GetOrDefaultSecond(EnvHTTPTimeout, 30*time.Second),
 	}
 }