diff --git a/go.mod b/go.mod
index 71b1d3d..778b16f 100644
--- a/go.mod
+++ b/go.mod
@@ -2,7 +2,7 @@ module github.com/blinklabs-io/cardano-models
 
 go 1.20
 
-require github.com/blinklabs-io/gouroboros v0.64.0
+require github.com/blinklabs-io/gouroboros v0.66.0
 
 require (
 	github.com/fxamacker/cbor/v2 v2.5.0 // indirect
diff --git a/go.sum b/go.sum
index bcc0eee..b686968 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-github.com/blinklabs-io/gouroboros v0.64.0 h1:8wm1blxhE+qI/GElc3/pmi3YoI3jepEEPFJK6LkP/JE=
-github.com/blinklabs-io/gouroboros v0.64.0/go.mod h1:fph4LBNmSliMxt5ut40lXqqbZHWmXjT6p7o1hCyDEbQ=
+github.com/blinklabs-io/gouroboros v0.66.0 h1:1jZ5r+ZUoSzy+hK/NoZeTiUdBCC2w0ikshnM291B3ps=
+github.com/blinklabs-io/gouroboros v0.66.0/go.mod h1:fph4LBNmSliMxt5ut40lXqqbZHWmXjT6p7o1hCyDEbQ=
 github.com/fxamacker/cbor/v2 v2.5.0 h1:oHsG0V/Q6E/wqTS2O1Cozzsy69nqCiguo5Q1a1ADivE=
 github.com/fxamacker/cbor/v2 v2.5.0/go.mod h1:TA1xS00nchWmaBnEIxPSE5oHLuJBAVvqrtAnWBwBCVo=
 github.com/jinzhu/copier v0.4.0 h1:w3ciUoD19shMCRargcpm0cm91ytaBhDvuRpz1ODO/U8=