diff --git a/nano/node/node.cpp b/nano/node/node.cpp
index fba25672..9910a8a3 100644
--- a/nano/node/node.cpp
+++ b/nano/node/node.cpp
@@ -975,7 +975,7 @@ bool nano::node::collect_ledger_pruning_targets (std::deque<nano::block_hash> &
 {
 	uint64_t read_operations (0);
 	bool finish_transaction (false);
-	auto const transaction = ledger.tx_begin_read ();
+	auto transaction = ledger.tx_begin_read ();
 	for (auto i (store.confirmation_height.begin (transaction, last_account_a)), n (store.confirmation_height.end ()); i != n && !finish_transaction;)
 	{
 		++read_operations;
diff --git a/nano/node/scheduler/hinted.cpp b/nano/node/scheduler/hinted.cpp
index a01fe97c..a507d5e5 100644
--- a/nano/node/scheduler/hinted.cpp
+++ b/nano/node/scheduler/hinted.cpp
@@ -68,7 +68,7 @@ bool nano::scheduler::hinted::predicate () const
 	return active.vacancy (nano::election_behavior::hinted) > 0;
 }
 
-void nano::scheduler::hinted::activate (secure::read_transaction const & transaction, nano::block_hash const & hash, bool check_dependents)
+void nano::scheduler::hinted::activate (secure::read_transaction & transaction, nano::block_hash const & hash, bool check_dependents)
 {
 	const int max_iterations = 64;
 
diff --git a/nano/node/scheduler/hinted.hpp b/nano/node/scheduler/hinted.hpp
index e26772bd..12eea046 100644
--- a/nano/node/scheduler/hinted.hpp
+++ b/nano/node/scheduler/hinted.hpp
@@ -71,7 +71,7 @@ private:
 	bool predicate () const;
 	void run ();
 	void run_iterative ();
-	void activate (secure::read_transaction const &, nano::block_hash const & hash, bool check_dependents);
+	void activate (secure::read_transaction &, nano::block_hash const & hash, bool check_dependents);
 
 	nano::uint128_t tally_threshold () const;
 	nano::uint128_t final_tally_threshold () const;
diff --git a/nano/secure/transaction.hpp b/nano/secure/transaction.hpp
index 5dd5e36d..eedb7653 100644
--- a/nano/secure/transaction.hpp
+++ b/nano/secure/transaction.hpp
@@ -108,12 +108,12 @@ public:
 		return txn;
 	}
 
-	void refresh () const
+	void refresh ()
 	{
 		txn.refresh ();
 	}
 
-	void refresh_if_needed (std::chrono::milliseconds max_age = std::chrono::milliseconds{ 500 }) const
+	void refresh_if_needed (std::chrono::milliseconds max_age = std::chrono::milliseconds{ 500 })
 	{
 		txn.refresh_if_needed (max_age);
 	}
diff --git a/nano/store/transaction.cpp b/nano/store/transaction.cpp
index 4cbc57e4..cba69217 100644
--- a/nano/store/transaction.cpp
+++ b/nano/store/transaction.cpp
@@ -49,24 +49,24 @@ nano::id_dispenser::id_t nano::store::read_transaction::store_id () const
 	return impl->store_id;
 }
 
-void nano::store::read_transaction::reset () const
+void nano::store::read_transaction::reset ()
 {
 	impl->reset ();
 }
 
-void nano::store::read_transaction::renew () const
+void nano::store::read_transaction::renew ()
 {
 	impl->renew ();
 	start = std::chrono::steady_clock::now ();
 }
 
-void nano::store::read_transaction::refresh () const
+void nano::store::read_transaction::refresh ()
 {
 	reset ();
 	renew ();
 }
 
-void nano::store::read_transaction::refresh_if_needed (std::chrono::milliseconds max_age) const
+void nano::store::read_transaction::refresh_if_needed (std::chrono::milliseconds max_age)
 {
 	auto now = std::chrono::steady_clock::now ();
 	if (now - start > max_age)
diff --git a/nano/store/transaction.hpp b/nano/store/transaction.hpp
index 042b42bb..e0b4b9eb 100644
--- a/nano/store/transaction.hpp
+++ b/nano/store/transaction.hpp
@@ -53,14 +53,14 @@ public:
 	void * get_handle () const override;
 	nano::id_dispenser::id_t store_id () const override;
 
-	void reset () const;
-	void renew () const;
-	void refresh () const;
-	void refresh_if_needed (std::chrono::milliseconds max_age = std::chrono::milliseconds{ 500 }) const;
+	void reset ();
+	void renew ();
+	void refresh ();
+	void refresh_if_needed (std::chrono::milliseconds max_age = std::chrono::milliseconds{ 500 });
 
 private:
 	std::unique_ptr<read_transaction_impl> impl;
-	mutable std::chrono::steady_clock::time_point start;
+	std::chrono::steady_clock::time_point start;
 };
 
 /**