diff --git a/cmd/http-gw/settings.go b/cmd/http-gw/settings.go
index cb309b7..7e53158 100644
--- a/cmd/http-gw/settings.go
+++ b/cmd/http-gw/settings.go
@@ -560,7 +560,7 @@ func fetchCacheLifetime(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultV
 	if v.IsSet(cfgEntry) {
 		lifetime := v.GetDuration(cfgEntry)
 		if lifetime <= 0 {
-			l.Error("invalid lifetime, using default value (in seconds)",
+			l.Error(logs.InvalidLifetimeUsingDefaultValue,
 				zap.String("parameter", cfgEntry),
 				zap.Duration("value in config", lifetime),
 				zap.Duration("default", defaultValue))
@@ -576,7 +576,7 @@ func fetchCacheSize(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultValue
 	if v.IsSet(cfgEntry) {
 		size := v.GetInt(cfgEntry)
 		if size <= 0 {
-			l.Error("invalid cache size, using default value",
+			l.Error(logs.InvalidCacheSizeUsingDefaultValue,
 				zap.String("parameter", cfgEntry),
 				zap.Int("value in config", size),
 				zap.Int("default", defaultValue))
diff --git a/internal/logs/logs.go b/internal/logs/logs.go
index 0534ebc..9d464c3 100644
--- a/internal/logs/logs.go
+++ b/internal/logs/logs.go
@@ -70,4 +70,7 @@ const (
 	CouldntGetBucket                                                      = "could not get bucket"                                                                   // Error in ../handler/utils.go
 	CouldntPutBucketIntoCache                                             = "couldn't put bucket info into cache"                                                    // Warn in ../handler/handler.go
 	InvalidCacheEntryType                                                 = "invalid cache entry type"                                                               // Warn in ../cache/buckets.go
+	InvalidLifetimeUsingDefaultValue                                      = "invalid lifetime, using default value (in seconds)"                                     // Error in ../../cmd/http-gw/settings.go
+	InvalidCacheSizeUsingDefaultValue                                     = "invalid cache size, using default value"                                                // Error in ../../cmd/http-gw/settings.go
+
 )