diff --git a/Cargo.lock b/Cargo.lock
index f7018a7..4796070 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -825,6 +825,12 @@ version = "0.21.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
 
+[[package]]
+name = "base64"
+version = "0.22.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9475866fec1451be56a3c2400fd081ff546538961565ccb5b7142cbd22bc7a51"
+
 [[package]]
 name = "bincode"
 version = "1.3.3"
@@ -1113,7 +1119,7 @@ dependencies = [
  "hex",
  "serde",
  "sha3",
- "tagged-base64",
+ "tagged-base64 0.3.4",
 ]
 
 [[package]]
@@ -2151,7 +2157,7 @@ dependencies = [
  "serde",
  "sha2 0.10.8",
  "snafu 0.8.2",
- "tagged-base64",
+ "tagged-base64 0.3.4",
  "time 0.3.34",
  "tokio",
  "tracing",
@@ -2169,7 +2175,7 @@ dependencies = [
  "hotshot-types",
  "serde",
  "snafu 0.7.5",
- "tagged-base64",
+ "tagged-base64 0.4.0",
  "tide-disco",
  "toml 0.8.11",
 ]
@@ -2547,7 +2553,7 @@ dependencies = [
  "rayon",
  "serde",
  "sha3",
- "tagged-base64",
+ "tagged-base64 0.3.4",
 ]
 
 [[package]]
@@ -2590,7 +2596,7 @@ dependencies = [
  "serde",
  "sha2 0.10.8",
  "sha3",
- "tagged-base64",
+ "tagged-base64 0.3.4",
  "typenum",
  "zeroize",
 ]
@@ -2634,7 +2640,7 @@ dependencies = [
  "rayon",
  "serde",
  "sha2 0.10.8",
- "tagged-base64",
+ "tagged-base64 0.3.4",
 ]
 
 [[package]]
@@ -4306,7 +4312,22 @@ dependencies = [
  "crc-any",
  "serde",
  "snafu 0.7.5",
- "tagged-base64-macros",
+ "tagged-base64-macros 0.3.3",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "tagged-base64"
+version = "0.4.0"
+source = "git+https://github.com/EspressoSystems/tagged-base64?tag=v0.4.0#eb449140f2feb597983ebaf0ee2464ed6cee322a"
+dependencies = [
+ "ark-serialize",
+ "ark-std",
+ "base64 0.22.0",
+ "crc-any",
+ "serde",
+ "snafu 0.8.2",
+ "tagged-base64-macros 0.4.0",
  "wasm-bindgen",
 ]
 
@@ -4319,6 +4340,15 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "tagged-base64-macros"
+version = "0.4.0"
+source = "git+https://github.com/EspressoSystems/tagged-base64?tag=v0.4.0#eb449140f2feb597983ebaf0ee2464ed6cee322a"
+dependencies = [
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "tap"
 version = "1.0.1"
@@ -4423,7 +4453,7 @@ dependencies = [
  "strum",
  "strum_macros",
  "surf",
- "tagged-base64",
+ "tagged-base64 0.3.4",
  "tide",
  "tide-websockets",
  "toml 0.8.11",
diff --git a/Cargo.toml b/Cargo.toml
index 7886173..c47ba82 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,6 +13,6 @@ futures = "0.3"
 hotshot-types = { git = "https://github.com/EspressoSystems/hotshot-types", tag = "0.1.8" }
 serde = { version = "1.0", features = ["derive"] }
 snafu = { version = "0.7", features = ["backtraces"] }
-tagged-base64 = { git = "https://github.com/EspressoSystems/tagged-base64", tag = "0.3.4" }
+tagged-base64 = { git = "https://github.com/EspressoSystems/tagged-base64", tag = "v0.4.0" }
 tide-disco = { git = "https://github.com/EspressoSystems/tide-disco.git", tag = "v0.4.6" }
 toml = "0.8"