diff --git a/gf.cabal b/gf.cabal
index fe9fb05b3..4443b6c33 100644
--- a/gf.cabal
+++ b/gf.cabal
@@ -1,17 +1,16 @@
 name: gf
-version: 3.10.4-git
+version: 3.11.0-git
 
-cabal-version: >= 1.22
+cabal-version: 1.22
 build-type: Custom
 license: OtherLicense
 license-file: LICENSE
 category: Natural Language Processing, Compiler
 synopsis: Grammatical Framework
 description: GF, Grammatical Framework, is a programming language for multilingual grammar applications
-homepage: http://www.grammaticalframework.org/
+homepage: https://www.grammaticalframework.org/
 bug-reports: https://github.com/GrammaticalFramework/gf-core/issues
-maintainer: Thomas Hallgren
-tested-with: GHC==7.10.3, GHC==8.0.2, GHC==8.2.2, GHC==8.4.3
+tested-with: GHC==7.10.3, GHC==8.0.2, GHC==8.10.4
 
 data-dir: src
 extra-source-files: WebSetup.hs
@@ -74,20 +73,22 @@ flag c-runtime
 
 library
   default-language:    Haskell2010
-  build-depends: base >= 4.6 && <5,
-                 array,
-                 containers,
-                 bytestring,
-                 utf8-string,
-                 random,
-                 pretty,
-                 mtl,
-                 exceptions,
-                 fail,
-                 -- For compatability with ghc < 8
-                 -- We need transformers-compat >= 0.6.3, but that is only in newer snapshots where it is redundant.
-                 transformers-compat,
-                 ghc-prim
+  build-depends:
+    -- GHC 8.0.2 to GHC 8.10.4
+    base >= 4.9.1 && <4.15,
+    array >= 0.5.1 && < 0.6,
+    containers >= 0.5.7 && < 0.7,
+    bytestring >= 0.10.8 && < 0.11,
+    utf8-string >= 1.0.1.1 && < 1.1,
+    random >= 1.1 && < 1.3,
+    pretty >= 1.1.3 && < 1.2,
+    mtl >= 2.2.1 && < 2.3,
+    -- For compatability with GHC < 8
+    exceptions >= 0.8.3 && < 0.11,
+    fail >= 4.9.0 && < 4.10,
+    -- We need transformers-compat >= 0.6.3, but that is only in newer snapshots where it is redundant.
+    transformers-compat >= 0.5.1.4 && < 0.7,
+    ghc-prim >= 0.5.0 && < 0.7
   hs-source-dirs: src/runtime/haskell
 
   other-modules:
@@ -146,8 +147,14 @@ library
 
 ---- GF compiler as a library:
 
-  build-depends: filepath, directory>=1.2, time,
-                 process, haskeline, parallel>=3, json
+  build-depends:
+    filepath >= 1.4.1 && < 1.5,
+    directory >= 1.3.0 && < 1.4,
+    time >= 1.6.0 && < 1.10,
+    process >= 1.4.3 && < 1.7,
+    haskeline >= 0.7.3 && < 0.9,
+    parallel >= 3.2.1.1 && < 3.3,
+    json >= 0.9.1 && < 0.11
 
   hs-source-dirs: src/compiler
   exposed-modules:
@@ -273,12 +280,12 @@ library
     cpp-options: -DC_RUNTIME
 
   if flag(server)
-    build-depends: httpd-shed>=0.4.0.3, network>=2.3 && <2.7,
-                   cgi>=3001.2.2.0
+    build-depends: httpd-shed >= 0.4.0 && < 0.5, network>=2.3 && <2.7,
+                   cgi >= 3001.3.0.2 && < 3001.6
     if flag(network-uri)
-      build-depends: network-uri>=2.6, network>=2.6
+      build-depends: network-uri >= 2.6.1.0 && < 2.7, network>=2.6 && <2.7
     else
-      build-depends: network<2.6
+      build-depends: network >= 2.5 && <2.6
 
     cpp-options: -DSERVER_MODE
     other-modules:
@@ -312,9 +319,9 @@ library
   ghc-options: -fno-warn-tabs
 
   if os(windows)
-    build-depends: Win32
+    build-depends: Win32 >= 2.3.1.1 && < 2.7
   else
-    build-depends: unix, terminfo>=0.4
+    build-depends: unix >= 2.7.2 && < 2.8, terminfo >=0.4.0 && < 0.5
 
   if impl(ghc>=8.2)
     ghc-options: -fhide-source-paths
diff --git a/src/runtime/haskell-bind/pgf2.cabal b/src/runtime/haskell-bind/pgf2.cabal
index c8d5d8c6c..eb1e3c708 100644
--- a/src/runtime/haskell-bind/pgf2.cabal
+++ b/src/runtime/haskell-bind/pgf2.cabal
@@ -1,18 +1,21 @@
 name: pgf2
 version: 1.3.0
+
+cabal-version: 1.22
+build-type: Simple
+license: LGPL-3
+license-file: LICENSE
+category: Natural Language Processing
 synopsis: Bindings to the C version of the PGF runtime
 description:
   GF, Grammatical Framework, is a programming language for multilingual grammar applications.
   GF grammars are compiled into Portable Grammar Format (PGF) which can be used with the PGF runtime, written in C.
   This package provides Haskell bindings to that runtime.
-homepage: https://www.grammaticalframework.org
-license: LGPL-3
-license-file: LICENSE
+homepage: https://www.grammaticalframework.org/
+bug-reports: https://github.com/GrammaticalFramework/gf-core/issues
 author: Krasimir Angelov
-category: Natural Language Processing
-build-type: Simple
 extra-source-files: CHANGELOG.md, README.md
-cabal-version: >=1.10
+tested-with: GHC==7.10.3, GHC==8.0.2, GHC==8.10.4
 
 library
   exposed-modules:
@@ -23,9 +26,9 @@ library
     PGF2.Expr,
     PGF2.Type
   build-depends:
-    base >=4.3 && <5,
-    containers,
-    pretty
+    base >= 4.9.1 && <4.15,
+    containers >= 0.5.7 && < 0.7,
+    pretty >= 1.1.3 && < 1.2
   default-language: Haskell2010
   build-tools: hsc2hs
   extra-libraries: pgf gu
diff --git a/src/runtime/haskell-bind/stack-ghc7.10.3.yaml b/src/runtime/haskell-bind/stack-ghc7.10.3.yaml
new file mode 100644
index 000000000..c916b4bb0
--- /dev/null
+++ b/src/runtime/haskell-bind/stack-ghc7.10.3.yaml
@@ -0,0 +1,3 @@
+resolver: lts-6.35 # ghc 7.10.3
+
+allow-newer: true
diff --git a/src/runtime/haskell-bind/stack-ghc8.0.2.yaml b/src/runtime/haskell-bind/stack-ghc8.0.2.yaml
new file mode 100644
index 000000000..af08206d9
--- /dev/null
+++ b/src/runtime/haskell-bind/stack-ghc8.0.2.yaml
@@ -0,0 +1 @@
+resolver: lts-9.21 # ghc 8.0.2
diff --git a/src/runtime/haskell-bind/stack-ghc8.10.4.yaml b/src/runtime/haskell-bind/stack-ghc8.10.4.yaml
new file mode 100644
index 000000000..195e90993
--- /dev/null
+++ b/src/runtime/haskell-bind/stack-ghc8.10.4.yaml
@@ -0,0 +1 @@
+resolver: lts-18.0 # ghc 8.10.4
diff --git a/src/runtime/haskell/pgf.cabal b/src/runtime/haskell/pgf.cabal
index f829a6e35..56c1ca04a 100644
--- a/src/runtime/haskell/pgf.cabal
+++ b/src/runtime/haskell/pgf.cabal
@@ -1,29 +1,30 @@
 name: pgf
-version: 3.10.1-git
+version: 3.11.0-git
 
-cabal-version: >= 1.20
+cabal-version: 1.22
 build-type: Simple
 license: OtherLicense
 category: Natural Language Processing
 synopsis: Grammatical Framework
 description: A library for interpreting the Portable Grammar Format (PGF)
-homepage: http://www.grammaticalframework.org/
+homepage: https://www.grammaticalframework.org/
 bug-reports: https://github.com/GrammaticalFramework/gf-core/issues
-tested-with: GHC==7.6.3, GHC==7.8.3, GHC==7.10.3, GHC==8.0.2, GHC==8.4.4
+tested-with: GHC==7.10.3, GHC==8.0.2, GHC==8.10.4
 
 library
   default-language: Haskell2010
   build-depends:
-    array,
-    base >= 4.6 && <5,
-    bytestring,
-    containers,
-    -- exceptions,
-    ghc-prim,
-    mtl,
-    pretty,
-    random,
-    utf8-string
+    base >= 4.9.1 && <4.15,
+    array >= 0.5.1 && < 0.6,
+    containers >= 0.5.7 && < 0.7,
+    bytestring >= 0.10.8 && < 0.11,
+    utf8-string >= 1.0.1.1 && < 1.1,
+    random >= 1.1 && < 1.3,
+    pretty >= 1.1.3 && < 1.2,
+    mtl >= 2.2.1 && < 2.3,
+    ghc-prim >= 0.5.0 && < 0.7,
+    -- For compatability with GHC < 8
+    fail >= 4.9.0 && < 4.10
 
   other-modules:
     -- not really part of GF but I have changed the original binary library
diff --git a/src/runtime/haskell/stack-ghc7.10.3.yaml b/src/runtime/haskell/stack-ghc7.10.3.yaml
new file mode 100644
index 000000000..c916b4bb0
--- /dev/null
+++ b/src/runtime/haskell/stack-ghc7.10.3.yaml
@@ -0,0 +1,3 @@
+resolver: lts-6.35 # ghc 7.10.3
+
+allow-newer: true
diff --git a/src/runtime/haskell/stack-ghc8.0.2.yaml b/src/runtime/haskell/stack-ghc8.0.2.yaml
new file mode 100644
index 000000000..af08206d9
--- /dev/null
+++ b/src/runtime/haskell/stack-ghc8.0.2.yaml
@@ -0,0 +1 @@
+resolver: lts-9.21 # ghc 8.0.2
diff --git a/src/runtime/haskell/stack-ghc8.10.4.yaml b/src/runtime/haskell/stack-ghc8.10.4.yaml
new file mode 100644
index 000000000..195e90993
--- /dev/null
+++ b/src/runtime/haskell/stack-ghc8.10.4.yaml
@@ -0,0 +1 @@
+resolver: lts-18.0 # ghc 8.10.4
diff --git a/stack-ghc8.10.4.yaml b/stack-ghc8.10.4.yaml
new file mode 100644
index 000000000..b10f66e4f
--- /dev/null
+++ b/stack-ghc8.10.4.yaml
@@ -0,0 +1,14 @@
+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.yaml b/stack.yaml
index 69b8c8790..3a79afdf0 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,13 +1,15 @@
-# This default stack file is a copy of stack-ghc8.6.5.yaml
+# This default stack file is a copy of stack-ghc8.10.4.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-14.27 # ghc 8.6.5
+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
+- cgi-3001.5.0.0@sha256:3d1193a328d5f627a021a0ef3927c1ae41dd341e32dba612fed52d0e3a6df056,2990
+- json-0.10@sha256:d9fc6b07ce92b8894825a17d2cf14799856767eb30c8bf55962baa579207d799,3210
+- multipart-0.2.0@sha256:b8770e3ff6089be4dd089a8250894b31287cca671f3d258190a505f9351fa8a9,1084
 
 # flags:
 #   gf: