diff --git a/Cargo.lock b/Cargo.lock
index 97b64e07e4133..3a2aedef518ef 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -9794,9 +9794,9 @@ checksum = "1e81da0851ada1f3e9d4312c704aa4f8806f0f9d69faaf8df2f3464b4a9437c2"
 
 [[package]]
 name = "syn"
-version = "1.0.69"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48fe99c6bd8b1cc636890bcc071842de909d902c81ac7dab53ba33c421ab8ffb"
+checksum = "a4eac2e6c19f5c3abc0c229bea31ff0b9b091c7b14990e8924b92902a303a0c0"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/client/chain-spec/derive/Cargo.toml b/client/chain-spec/derive/Cargo.toml
index 8df820a46aeec..e25abcac57bee 100644
--- a/client/chain-spec/derive/Cargo.toml
+++ b/client/chain-spec/derive/Cargo.toml
@@ -18,6 +18,6 @@ proc-macro = true
 proc-macro-crate = "1.0.0"
 proc-macro2 = "1.0.6"
 quote = "1.0.3"
-syn = "1.0.58"
+syn = "1.0.78"
 
 [dev-dependencies]
diff --git a/client/tracing/proc-macro/Cargo.toml b/client/tracing/proc-macro/Cargo.toml
index 3c06a75f0a1f1..6aef1bba4cdd7 100644
--- a/client/tracing/proc-macro/Cargo.toml
+++ b/client/tracing/proc-macro/Cargo.toml
@@ -18,4 +18,4 @@ proc-macro = true
 proc-macro-crate = "1.0.0"
 proc-macro2 = "1.0.6"
 quote = { version = "1.0.3", features = ["proc-macro"] }
-syn = { version = "1.0.58", features = ["proc-macro", "full", "extra-traits", "parsing"] }
+syn = { version = "1.0.78", features = ["proc-macro", "full", "extra-traits", "parsing"] }
diff --git a/frame/staking/reward-curve/Cargo.toml b/frame/staking/reward-curve/Cargo.toml
index fe5e0f4a947a2..8117769e6282b 100644
--- a/frame/staking/reward-curve/Cargo.toml
+++ b/frame/staking/reward-curve/Cargo.toml
@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.58", features = ["full", "visit"] }
+syn = { version = "1.0.78", features = ["full", "visit"] }
 quote = "1.0.3"
 proc-macro2 = "1.0.6"
 proc-macro-crate = "1.0.0"
diff --git a/frame/support/procedural/Cargo.toml b/frame/support/procedural/Cargo.toml
index 4a00a24e3849d..3638052e701b4 100644
--- a/frame/support/procedural/Cargo.toml
+++ b/frame/support/procedural/Cargo.toml
@@ -19,7 +19,7 @@ frame-support-procedural-tools = { version = "3.0.0", path = "./tools" }
 proc-macro2 = "1.0.6"
 quote = "1.0.3"
 Inflector = "0.11.4"
-syn = { version = "1.0.58", features = ["full"] }
+syn = { version = "1.0.78", features = ["full"] }
 
 [features]
 default = ["std"]
diff --git a/frame/support/procedural/tools/Cargo.toml b/frame/support/procedural/tools/Cargo.toml
index 316aae0a17a42..c5b9a56bd655c 100644
--- a/frame/support/procedural/tools/Cargo.toml
+++ b/frame/support/procedural/tools/Cargo.toml
@@ -15,5 +15,5 @@ targets = ["x86_64-unknown-linux-gnu"]
 frame-support-procedural-tools-derive = { version = "3.0.0", path = "./derive" }
 proc-macro2 = "1.0.6"
 quote = "1.0.3"
-syn = { version = "1.0.58", features = ["full", "visit"] }
+syn = { version = "1.0.78", features = ["full", "visit"] }
 proc-macro-crate = "1.0.0"
diff --git a/frame/support/procedural/tools/derive/Cargo.toml b/frame/support/procedural/tools/derive/Cargo.toml
index c377680af16f4..57ccf0d825d9a 100644
--- a/frame/support/procedural/tools/derive/Cargo.toml
+++ b/frame/support/procedural/tools/derive/Cargo.toml
@@ -17,4 +17,4 @@ proc-macro = true
 [dependencies]
 proc-macro2 = "1.0.6"
 quote = { version = "1.0.3", features = ["proc-macro"] }
-syn = { version = "1.0.58", features = ["proc-macro" ,"full", "extra-traits", "parsing"] }
+syn = { version = "1.0.78", features = ["proc-macro" ,"full", "extra-traits", "parsing"] }
diff --git a/max-encoded-len/derive/Cargo.toml b/max-encoded-len/derive/Cargo.toml
index 42c13dc50edd6..d609b4148c153 100644
--- a/max-encoded-len/derive/Cargo.toml
+++ b/max-encoded-len/derive/Cargo.toml
@@ -18,7 +18,7 @@ proc-macro = true
 proc-macro2 = "1.0.6"
 proc-macro-crate = "1.0.0"
 quote = "1.0.3"
-syn = { version = "1.0.58", features = ["full"] }
+syn = { version = "1.0.78", features = ["full"] }
 
 [features]
 default = ["std"]
diff --git a/primitives/api/proc-macro/Cargo.toml b/primitives/api/proc-macro/Cargo.toml
index 1df8c489e9148..293cb85050e56 100644
--- a/primitives/api/proc-macro/Cargo.toml
+++ b/primitives/api/proc-macro/Cargo.toml
@@ -18,7 +18,7 @@ proc-macro = true
 
 [dependencies]
 quote = "1.0.3"
-syn = { version = "1.0.58", features = ["full", "fold", "extra-traits", "visit"] }
+syn = { version = "1.0.78", features = ["full", "fold", "extra-traits", "visit"] }
 proc-macro2 = "1.0.6"
 blake2-rfc = { version = "0.2.18", default-features = false }
 proc-macro-crate = "1.0.0"
diff --git a/primitives/debug-derive/Cargo.toml b/primitives/debug-derive/Cargo.toml
index 0d3ba805100c4..3ebf4e5fd96fd 100644
--- a/primitives/debug-derive/Cargo.toml
+++ b/primitives/debug-derive/Cargo.toml
@@ -18,7 +18,7 @@ proc-macro = true
 
 [dependencies]
 quote = "1.0.3"
-syn = "1.0.58"
+syn = "1.0.78"
 proc-macro2 = "1.0"
 
 [features]
diff --git a/primitives/npos-elections/compact/Cargo.toml b/primitives/npos-elections/compact/Cargo.toml
index 63432a36efc80..4fff7a7df52c0 100644
--- a/primitives/npos-elections/compact/Cargo.toml
+++ b/primitives/npos-elections/compact/Cargo.toml
@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.58", features = ["full", "visit"] }
+syn = { version = "1.0.78", features = ["full", "visit"] }
 quote = "1.0"
 proc-macro2 = "1.0.6"
 proc-macro-crate = "1.0.0"
diff --git a/primitives/runtime-interface/proc-macro/Cargo.toml b/primitives/runtime-interface/proc-macro/Cargo.toml
index ae74ff739b187..b96bcd856fe20 100644
--- a/primitives/runtime-interface/proc-macro/Cargo.toml
+++ b/primitives/runtime-interface/proc-macro/Cargo.toml
@@ -16,7 +16,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 proc-macro = true
 
 [dependencies]
-syn = { version = "1.0.58", features = ["full", "visit", "fold", "extra-traits"] }
+syn = { version = "1.0.78", features = ["full", "visit", "fold", "extra-traits"] }
 quote = "1.0.3"
 proc-macro2 = "1.0.3"
 Inflector = "0.11.4"
diff --git a/primitives/version/proc-macro/Cargo.toml b/primitives/version/proc-macro/Cargo.toml
index ea3144090c70e..e8c61ea21355b 100644
--- a/primitives/version/proc-macro/Cargo.toml
+++ b/primitives/version/proc-macro/Cargo.toml
@@ -17,7 +17,7 @@ proc-macro = true
 
 [dependencies]
 quote = "1.0.3"
-syn = { version = "1.0.58", features = ["full", "fold", "extra-traits", "visit"] }
+syn = { version = "1.0.78", features = ["full", "fold", "extra-traits", "visit"] }
 proc-macro2 = "1.0.6"
 proc-macro-crate = "1.0.0"
 codec = { package = "parity-scale-codec", version = "2.0.0", features = [ "derive" ] }
diff --git a/test-utils/derive/Cargo.toml b/test-utils/derive/Cargo.toml
index 501a7058c634d..d03b205ac16f7 100644
--- a/test-utils/derive/Cargo.toml
+++ b/test-utils/derive/Cargo.toml
@@ -10,7 +10,7 @@ description = "Substrate test utilities macros"
 
 [dependencies]
 quote = "1.0.6"
-syn = { version = "1.0.58", features = ["full"] }
+syn = { version = "1.0.78", features = ["full"] }
 proc-macro-crate = "1.0.0"
 
 [lib]