diff --git a/package.yaml b/package.yaml
index f46456c..c3458b1 100644
--- a/package.yaml
+++ b/package.yaml
@@ -21,7 +21,7 @@ description:         Hascard is a text-based user interface for reviewing notes
 
 dependencies:
 - base                 >= 4.7 && < 5
-- brick                >= 0.52.1 && < 0.56
+- brick                >= 0.52.1 && < 0.60
 - containers           > 0.6.0 && < 0.7
 - directory            >= 1.3.3 && < 1.4
 - filepath             >= 1.4.2 && < 1.5
@@ -30,13 +30,13 @@ dependencies:
 - mwc-random           >= 0.14 && < 0.15
 - optparse-applicative >= 0.15.1 && < 0.16
 - ordered-containers   >= 0.2.2 && < 0.3
-- megaparsec           >= 8.0.0 && < 8.1
+- megaparsec           >= 8.0.0 && < 10
 - process              >= 1.6.5 && < 1.7
 - random-fu            >= 0.2.7 && < 0.3
-- strict               >= 0.3.2 && < 0.4
+- strict               >= 0.3.2 && < 0.5
 - text                 >= 1.2.3 && < 1.3
 - vector               >= 0.12.0 && < 0.13
-- vty                  >= 5.28.2 && < 5.31
+- vty                  >= 5.28.2 && < 5.33
 - word-wrap            >= 0.4.1 && < 0.5
 - tasty                >= 1.2.1 && < 1.3
 - tasty-hunit          >= 0.10.0 && < 0.11
diff --git a/stack.yaml b/stack.yaml
index fa0ea67..aac7bcd 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -17,7 +17,7 @@
 #
 # resolver: ./custom-snapshot.yaml
 # resolver: https://example.com/snapshots/2018-01-01.yaml
-resolver: lts-16.2
+resolver: lts-17.4
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.
@@ -35,11 +35,6 @@ packages:
 # forks / in-progress versions pinned to a git hash. For example:
 #
 extra-deps:
-- random-fu-0.2.7.4
-- random-1.1
-- random-source-0.3.0.8
-- rvar-0.2.0.6@sha256:d07cbb734ec307539fb58d4344b2284a1a91f41c9308f437c27ae8bada2111bf,2317
-- flexible-defaults-0.0.3@sha256:6a7ab000561e1075003cb1053dfbbb4020ae2b02916776d1479c9c3fc82f5d0d,2508
 # - acme-missiles-0.3
 # - git: https://github.com/commercialhaskell/stack.git
 #   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
diff --git a/stack.yaml.lock b/stack.yaml.lock
index 5c61268..108ab08 100644
--- a/stack.yaml.lock
+++ b/stack.yaml.lock
@@ -3,45 +3,10 @@
 # For more information, please see the documentation at:
 #   https://docs.haskellstack.org/en/stable/lock_files
 
-packages:
-- completed:
-    hackage: random-fu-0.2.7.4@sha256:5b5cd338ebbf02ff867691ec27abe481158fb2ae161c3e2e77163434eea0008a,4527
-    pantry-tree:
-      size: 2455
-      sha256: b8b0f7e60515305dd2ccb3d8fb03e7efd985addcdf247ac9a522f4bcbe1d1caa
-  original:
-    hackage: random-fu-0.2.7.4
-- completed:
-    hackage: random-1.1@sha256:7b67624fd76ddf97c206de0801dc7e888097e9d572974be9b9ea6551d76965df,1777
-    pantry-tree:
-      size: 637
-      sha256: 14a1b01728c5584e87c9fa00746a66e28ffd89dd2c0eabd334c8463953496e1b
-  original:
-    hackage: random-1.1
-- completed:
-    hackage: random-source-0.3.0.8@sha256:db1897e13adb4748d571a8e71fb0c38911ae66ea2557d4def7c30378a0ae2f69,3879
-    pantry-tree:
-      size: 914
-      sha256: 3f27fb10fa6f7c78a2256069579ad46c390ed6cc98203ff4240a30ab3065126f
-  original:
-    hackage: random-source-0.3.0.8
-- completed:
-    hackage: rvar-0.2.0.6@sha256:d07cbb734ec307539fb58d4344b2284a1a91f41c9308f437c27ae8bada2111bf,2317
-    pantry-tree:
-      size: 158
-      sha256: 48f154bad9ac1cf15c8df874bb903ece2e0d1fe1703e144f31fa32bd776581c0
-  original:
-    hackage: rvar-0.2.0.6@sha256:d07cbb734ec307539fb58d4344b2284a1a91f41c9308f437c27ae8bada2111bf,2317
-- completed:
-    hackage: flexible-defaults-0.0.3@sha256:6a7ab000561e1075003cb1053dfbbb4020ae2b02916776d1479c9c3fc82f5d0d,2508
-    pantry-tree:
-      size: 497
-      sha256: 53d8b98b9e899d63f7e464670e908f6eb22d8a5ba0b6ea48182fb810b426f0f8
-  original:
-    hackage: flexible-defaults-0.0.3@sha256:6a7ab000561e1075003cb1053dfbbb4020ae2b02916776d1479c9c3fc82f5d0d,2508
+packages: []
 snapshots:
 - completed:
-    size: 531674
-    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/16/2.yaml
-    sha256: 4b08fb9338ca297de7ade8318f4be1216f14dff8c0426c001fb7886ee88cb84a
-  original: lts-16.2
+    size: 563103
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/17/4.yaml
+    sha256: f11e2153044f5f71ea7b1c9398f4721f517c9bd37642ed769647b896564021f3
+  original: lts-17.4