diff --git a/stack-8.10.3.yaml b/stack-8.10.3.yaml
index b40e7aad32..17807b96e1 100644
--- a/stack-8.10.3.yaml
+++ b/stack-8.10.3.yaml
@@ -1,4 +1,4 @@
-resolver: nightly-2021-02-06
+resolver: lts-17.2 # Last ghc-8.10.3 lts
 
 packages:
   - .
diff --git a/stack-8.10.4.yaml b/stack-8.10.4.yaml
index 0a131baa46..278c124bdc 100644
--- a/stack-8.10.4.yaml
+++ b/stack-8.10.4.yaml
@@ -1,5 +1,4 @@
-resolver: nightly-2021-02-06
-compiler: ghc-8.10.4
+resolver: lts-17.4
 
 packages:
   - .