diff --git a/.github/workflows/build-all-versions.yml b/.github/workflows/build-all-versions.yml
index 3472fa92b..445493065 100644
--- a/.github/workflows/build-all-versions.yml
+++ b/.github/workflows/build-all-versions.yml
@@ -18,7 +18,7 @@ jobs:
         ghc:
           - "8.6.5"
           - "8.8.3"
-          - "8.10.1"
+          - "8.10.7"
         exclude:
           - os: macos-latest
             ghc: 8.8.3
@@ -66,7 +66,7 @@ jobs:
     strategy:
       matrix:
         stack: ["latest"]
-        ghc: ["7.10.3","8.0.2", "8.2.2", "8.4.4", "8.6.5", "8.8.4"]
+        ghc: ["7.10.3","8.0.2", "8.2.2", "8.4.4", "8.6.5", "8.8.4", "8.10.7"]
         # ghc: ["8.8.3"]
 
     steps:
diff --git a/stack-ghc8.10.4.yaml b/stack-ghc8.10.4.yaml
deleted file mode 100644
index b10f66e4f..000000000
--- a/stack-ghc8.10.4.yaml
+++ /dev/null
@@ -1,14 +0,0 @@
-resolver: lts-18.0 # ghc 8.10.4
-
-extra-deps:
-- network-2.6.3.6
-- httpd-shed-0.4.0.3
-- cgi-3001.5.0.0@sha256:3d1193a328d5f627a021a0ef3927c1ae41dd341e32dba612fed52d0e3a6df056,2990
-- json-0.10@sha256:d9fc6b07ce92b8894825a17d2cf14799856767eb30c8bf55962baa579207d799,3210
-- multipart-0.2.0@sha256:b8770e3ff6089be4dd089a8250894b31287cca671f3d258190a505f9351fa8a9,1084
-
-# flags:
-#   gf:
-#     c-runtime: true
-# extra-lib-dirs:
-#   - /usr/local/lib
diff --git a/stack-ghc8.10.7.yaml b/stack-ghc8.10.7.yaml
new file mode 100644
index 000000000..4b3f6643a
--- /dev/null
+++ b/stack-ghc8.10.7.yaml
@@ -0,0 +1,12 @@
+resolver: lts-18.27 # ghc 8.10.7
+
+extra-deps:
+- network-2.6.3.6
+- httpd-shed-0.4.0.3
+
+# flags:
+#   gf:
+#     server: true
+#     c-runtime: true
+# extra-lib-dirs:
+#   - /usr/local/lib
diff --git a/stack.yaml b/stack.yaml
index 3a79afdf0..128b91f8a 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,18 +1,15 @@
-# This default stack file is a copy of stack-ghc8.10.4.yaml
+# This default stack file is a copy of stack-ghc8.10.7.yaml
 # But committing a symlink can be problematic on Windows, so it's a real copy.
 # See: https://github.com/GrammaticalFramework/gf-core/pull/106
-
-resolver: lts-18.0 # ghc 8.10.4
+resolver: lts-18.27 # ghc 8.10.7
 
 extra-deps:
 - network-2.6.3.6
 - httpd-shed-0.4.0.3
-- cgi-3001.5.0.0@sha256:3d1193a328d5f627a021a0ef3927c1ae41dd341e32dba612fed52d0e3a6df056,2990
-- json-0.10@sha256:d9fc6b07ce92b8894825a17d2cf14799856767eb30c8bf55962baa579207d799,3210
-- multipart-0.2.0@sha256:b8770e3ff6089be4dd089a8250894b31287cca671f3d258190a505f9351fa8a9,1084
 
 # flags:
 #   gf:
+#     server: true
 #     c-runtime: true
 # extra-lib-dirs:
 #   - /usr/local/lib