diff --git a/go.mod b/go.mod
index 91af606..f5e1a47 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module git.wow.st/gmp/goget
 
 go 1.23.0
 
-require git.wow.st/gmp/ohlc v0.0.0-20241115023606-83f41a06596c // indirect
+require git.wow.st/gmp/ohlc v0.0.0-20241115230120-714064615eb3 // indirect
diff --git a/go.sum b/go.sum
index 6493515..931e33a 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,4 @@
 git.wow.st/gmp/ohlc v0.0.0-20241115023606-83f41a06596c h1:etBdVfh2E4k00IzRBMuHsGm5HZg7S96JBZQpCGWshNE=
 git.wow.st/gmp/ohlc v0.0.0-20241115023606-83f41a06596c/go.mod h1:QSSqMCu9AFoYtfqA9Hbfpxy3mp5MT/d4fk0AzYnuoo8=
+git.wow.st/gmp/ohlc v0.0.0-20241115230120-714064615eb3 h1:HDrgOSn1k2EzP0XIZbToUvwW3GXmZSnddq+/Zv2R4Mc=
+git.wow.st/gmp/ohlc v0.0.0-20241115230120-714064615eb3/go.mod h1:QSSqMCu9AFoYtfqA9Hbfpxy3mp5MT/d4fk0AzYnuoo8=
diff --git a/main.go b/main.go
index e7839b0..6ae692a 100644
--- a/main.go
+++ b/main.go
@@ -12,12 +12,12 @@ import (
 
 var (
 	retries = 5
-	concurrency = 30
+	concurrency = 1
 	ch chan string
 	clk chan bool
 	wg sync.WaitGroup
 
-	freq = time.Second / 30
+	freq = time.Second * 15
 	throttle bool
 	errs map[string]int
 	mu sync.Mutex
@@ -37,7 +37,7 @@ func get_(symbol string) (error) {
 		return err
 	}
 	switch resp.StatusCode {
-	case 401, 429:
+	case 401, 429, 500:
 		throttle = true
 		return fmt.Errorf("%s", resp.Status)
 		err_(symbol,0) // do not limit retries