diff --git a/go.mod b/go.mod
index 8e3edf5..d01e5b0 100644
--- a/go.mod
+++ b/go.mod
@@ -1,13 +1,15 @@
 module git.nemunai.re/nemunaire/idfm-api
 
-go 1.18
+go 1.21
+
+toolchain go1.22.3
 
 require (
 	github.com/gin-gonic/gin v1.10.0
 	github.com/mb0/wkt v0.0.0-20170420051526-a30afd545ee1
 	github.com/paulmach/go.geojson v1.5.0
 	github.com/pkg/errors v0.9.1
-	github.com/twpayne/go-geom v1.5.3
+	github.com/twpayne/go-geom v1.5.4
 	golang.org/x/text v0.15.0
 )
 
diff --git a/go.sum b/go.sum
index a356530..46c3df2 100644
--- a/go.sum
+++ b/go.sum
@@ -93,6 +93,8 @@ github.com/twpayne/go-geom v1.5.2 h1:LyRfBX2W0LM7XN/bGqX0XxrJ7SZc3XwmxU4aj4kSoxw
 github.com/twpayne/go-geom v1.5.2/go.mod h1:3z6O2sAnGtGCXx4Q+5nPOLCA5e8WI2t3cthdb1P2HH8=
 github.com/twpayne/go-geom v1.5.3 h1:UdH93XzTwpwPiAV38DJ74yg+9/YV9/WCGbKN+NmSvVA=
 github.com/twpayne/go-geom v1.5.3/go.mod h1:scDv/u90MVD6K+/7cA44kQt9fD6M/n+VuLddERxWYR8=
+github.com/twpayne/go-geom v1.5.4 h1:b8fiZd0SsEmQEeUdz2atT6KggF1KHiaZIi3DGi5p+sI=
+github.com/twpayne/go-geom v1.5.4/go.mod h1:Hw8RszQ2/d9Y/KfOm9CvUJo78BOoIA5g0e4P7JCVKvo=
 github.com/ugorji/go/codec v1.2.11 h1:BMaWp1Bb6fHwEtbplGBGJ498wD+LKlNSl25MjdZY4dU=
 github.com/ugorji/go/codec v1.2.11/go.mod h1:UNopzCgEMSXjBc6AOMqYvWC1ktqTAfzJZUZgYf6w6lg=
 github.com/ugorji/go/codec v1.2.12 h1:9LC83zGrHhuUA9l16C9AHXAqEV/2wBQ4nkvumAE65EE=