diff --git a/stack.yaml b/stack.yaml
index 83d93eccd..6eaf1360f 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -4,8 +4,7 @@ nix:
   pure: false
   packages: [perl gmp ncurses zlib]
 
-#resolver: nightly-2020-01-31
-resolver: lts-15.4
+resolver: lts-16.3
 
 packages:
 - hledger-lib
@@ -13,8 +12,7 @@ packages:
 - hledger-ui
 - hledger-web
 
-extra-deps:
-- doctest-0.16.3
+# extra-deps:
 # for hledger-lib:
 # for hledger:
 # for hledger-ui: