diff --git a/bazel-haskell-deps.bzl b/bazel-haskell-deps.bzl
index 9a4e7349d93..61ea1c80154 100644
--- a/bazel-haskell-deps.bzl
+++ b/bazel-haskell-deps.bzl
@@ -17,8 +17,8 @@ load("@os_info//:os_info.bzl", "is_windows")
 load("@dadew//:dadew.bzl", "dadew_tool_home")
 load("@rules_haskell//haskell:cabal.bzl", "stack_snapshot")
 
-GHCIDE_REV = "a6879b77da2968bae9256bb2f5658b909056d4ef"
-GHCIDE_SHA256 = "94be2607354c7ab111b87fa2b4afe8f6ef50981277864a05e906b7b0a783c58f"
+GHCIDE_REV = "c8818a7d7abf66a4a7302b360857e3a790ab1be4"
+GHCIDE_SHA256 = "999cd7677b0e6747b6ab7a1e503afc23380cd0c12d9781b09f9a905b8f49cca7"
 GHCIDE_VERSION = "0.1.0"
 JS_JQUERY_VERSION = "3.3.1"
 JS_DGTABLE_VERSION = "0.5.2"
diff --git a/daml-script/test/BUILD.bazel b/daml-script/test/BUILD.bazel
index 3e78d7f4005..4c509c0219e 100644
--- a/daml-script/test/BUILD.bazel
+++ b/daml-script/test/BUILD.bazel
@@ -35,7 +35,7 @@ dependencies:
   - daml-prim
   - daml-script.dar
 EOF
-      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror --ghc-option=-Wno-error=missing-signatures -o $$PWD/$(location script-test.dar)
+      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror -o $$PWD/$(location script-test.dar)
       rm -rf $$TMP_DIR
     """.format(sdk = sdk_version),
     tools = ["//compiler/damlc"],
@@ -66,7 +66,7 @@ dependencies:
   - daml-prim
   - daml-script-1.dev.dar
 EOF
-      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror --ghc-option=-Wno-error=missing-signatures -o $$PWD/$(location script-test-1.dev.dar)
+      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror -o $$PWD/$(location script-test-1.dev.dar)
       rm -rf $$TMP_DIR
     """.format(sdk = sdk_version),
     tools = ["//compiler/damlc"],
@@ -99,7 +99,7 @@ dependencies:
   - daml-prim
   - daml-script.dar
 EOF
-      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror --ghc-option=-Wno-error=missing-signatures -o $$PWD/$(location script-test-no-ledger.dar)
+      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror -o $$PWD/$(location script-test-no-ledger.dar)
       rm -rf $$TMP_DIR
     """.format(sdk = sdk_version),
     tools = ["//compiler/damlc"],
diff --git a/rules_daml/daml.bzl b/rules_daml/daml.bzl
index 5d303a34c43..00959e1aef7 100644
--- a/rules_daml/daml.bzl
+++ b/rules_daml/daml.bzl
@@ -19,9 +19,7 @@ _zipper = attr.label(
     cfg = "host",
 )
 
-# For some reason, -Werror seems to turn on -Wmissing-signatures so we turn
-# it off again.
-ghc_opts = ["--ghc-option=-Werror", "--ghc-option=-Wno-error=missing-signatures"]
+ghc_opts = ["--ghc-option=-Werror"]
 
 def _daml_configure_impl(ctx):
     project_name = ctx.attr.project_name
diff --git a/triggers/service/BUILD.bazel b/triggers/service/BUILD.bazel
index 8930d1f9fd8..1176ee84f65 100644
--- a/triggers/service/BUILD.bazel
+++ b/triggers/service/BUILD.bazel
@@ -211,7 +211,7 @@ dependencies:
   - daml-trigger.dar
   - daml-script.dar
 EOF
-      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror --ghc-option=-Wno-error=missing-signatures -o $$PWD/$(location test-model.dar)
+      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror -o $$PWD/$(location test-model.dar)
       rm -rf $$TMP_DIR
     """.format(sdk = sdk_version),
     tools = ["//compiler/damlc"],
diff --git a/triggers/tests/BUILD.bazel b/triggers/tests/BUILD.bazel
index 050e48fb1ea..8fe9350aab8 100644
--- a/triggers/tests/BUILD.bazel
+++ b/triggers/tests/BUILD.bazel
@@ -59,7 +59,7 @@ dependencies:
   - daml-script.dar
 EOF
       test -z "{lf_version}" || echo "build-options: [--target={lf_version}]" >> $$TMP_DIR/daml.yaml
-      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror --ghc-option=-Wno-error=missing-signatures -o $$PWD/$(location acs{suffix}.dar)
+      $(location //compiler/damlc) build --project-root=$$TMP_DIR --ghc-option=-Werror -o $$PWD/$(location acs{suffix}.dar)
       rm -rf $$TMP_DIR
     """.format(
             sdk = sdk_version,