diff --git a/app/app.go b/app/app.go
index aea38d1a..096baad2 100644
--- a/app/app.go
+++ b/app/app.go
@@ -29,6 +29,7 @@ import (
 	authkeeper "github.com/cosmos/cosmos-sdk/x/auth/keeper"
 	bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"
 	consensuskeeper "github.com/cosmos/cosmos-sdk/x/consensus/keeper"
+	crisiskeeper "github.com/cosmos/cosmos-sdk/x/crisis/keeper"
 	distrkeeper "github.com/cosmos/cosmos-sdk/x/distribution/keeper"
 	"github.com/cosmos/cosmos-sdk/x/genutil"
 	genutiltypes "github.com/cosmos/cosmos-sdk/x/genutil/types"
@@ -42,6 +43,7 @@ import (
 	_ "github.com/cosmos/cosmos-sdk/x/auth/tx/config"  // import for side-effects
 	_ "github.com/cosmos/cosmos-sdk/x/bank"            // import for side-effects
 	_ "github.com/cosmos/cosmos-sdk/x/consensus"       // import for side-effects
+	_ "github.com/cosmos/cosmos-sdk/x/crisis"          // import for side-effects
 	_ "github.com/cosmos/cosmos-sdk/x/distribution"    // import for side-effects
 	_ "github.com/cosmos/cosmos-sdk/x/mint"            // import for side-effects
 	_ "github.com/cosmos/cosmos-sdk/x/staking"         // import for side-effects
@@ -73,6 +75,7 @@ type LaconicApp struct {
 	BankKeeper            bankkeeper.Keeper
 	StakingKeeper         *stakingkeeper.Keeper
 	DistrKeeper           distrkeeper.Keeper
+	CrisisKeeper          *crisiskeeper.Keeper
 	ConsensusParamsKeeper consensuskeeper.Keeper
 
 	// laconic keepers
@@ -137,6 +140,7 @@ func NewLaconicApp(
 		&app.BankKeeper,
 		&app.StakingKeeper,
 		&app.DistrKeeper,
+		&app.CrisisKeeper,
 		&app.ConsensusParamsKeeper,
 		&app.AuctionKeeper,
 		&app.BondKeeper,
@@ -154,7 +158,8 @@ func NewLaconicApp(
 
 	/****  Module Options ****/
 
-	// TOOD: Required?
+	app.ModuleManager.RegisterInvariants(app.CrisisKeeper)
+
 	// create the simulation manager and define the order of the modules for deterministic simulations
 	// NOTE: this is not required apps that don't use the simulator for fuzz testing transactions
 	app.sm = module.NewSimulationManagerFromAppModules(app.ModuleManager.Modules, make(map[string]module.AppModuleSimulation, 0))
diff --git a/app/app.yaml b/app/app.yaml
index 3d432433..5d1601af 100644
--- a/app/app.yaml
+++ b/app/app.yaml
@@ -7,10 +7,10 @@ modules:
       # there is nothing left over in the validator fee pool, so as to keep the CanWithdrawInvariant invariant.
       # NOTE: staking module is required if HistoricalEntries param > 0
       begin_blockers: [distribution, staking]
-      end_blockers: [staking, auction, registry]
+      end_blockers: [crisis, staking, auction, registry]
       # NOTE: The genutils module must occur after staking so that pools are properly initialized with tokens from genesis accounts.
       # NOTE: The genutils module must also occur after auth so that it can access the params from auth.
-      init_genesis: [auth, bank, distribution, staking, genutil, auction, bond, registry]
+      init_genesis: [auth, bank, distribution, staking, crisis, genutil, auction, bond, registry]
       override_store_keys:
         - module_name: auth
           kv_store_key: acc
@@ -51,6 +51,9 @@ modules:
   - name: tx
     config:
       "@type": cosmos.tx.config.v1.Config
+  - name: crisis
+    config:
+      "@type": cosmos.crisis.module.v1.Module
   - name: bond
     config:
       "@type": cerc.bond.module.v1.Module
diff --git a/x/auction/keeper/invariants.go b/x/auction/keeper/invariants.go
new file mode 100644
index 00000000..8ed32a48
--- /dev/null
+++ b/x/auction/keeper/invariants.go
@@ -0,0 +1,38 @@
+package keeper
+
+import (
+	"fmt"
+
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	types "git.vdb.to/cerc-io/laconic2d/x/auction"
+)
+
+// RegisterInvariants registers all auction invariants
+func RegisterInvariants(ir sdk.InvariantRegistry, k *Keeper) {
+	ir.RegisterRoute(types.ModuleName, "module-accounts", ModuleAccountInvariant(k))
+}
+
+// AllInvariants runs all invariants of the auctions module.
+func AllInvariants(k *Keeper) sdk.Invariant {
+	return func(ctx sdk.Context) (string, bool) {
+		return ModuleAccountInvariant(k)(ctx)
+	}
+}
+
+// ModuleAccountInvariant checks that the 'auction' module account balance is non-negative.
+func ModuleAccountInvariant(k *Keeper) sdk.Invariant {
+	return func(ctx sdk.Context) (string, bool) {
+		fmt.Println("running auction module invariant")
+		moduleAddress := k.accountKeeper.GetModuleAddress(types.ModuleName)
+		if k.bankKeeper.GetAllBalances(ctx, moduleAddress).IsAnyNegative() {
+			return sdk.FormatInvariant(
+					types.ModuleName,
+					"module-account",
+					fmt.Sprintf("Module account '%s' has negative balance.", types.ModuleName)),
+				true
+		}
+
+		return "", false
+	}
+}
diff --git a/x/auction/module/module.go b/x/auction/module/module.go
index 7eb54db0..e2094d80 100644
--- a/x/auction/module/module.go
+++ b/x/auction/module/module.go
@@ -27,6 +27,7 @@ var (
 	_ module.HasServices         = AppModule{}
 	_ module.HasConsensusVersion = AppModule{}
 	_ appmodule.HasEndBlocker    = AppModule{}
+	_ module.HasInvariants       = AppModule{}
 )
 
 // ConsensusVersion defines the current module consensus version
@@ -126,6 +127,12 @@ func (am AppModule) EndBlock(ctx context.Context) error {
 	return EndBlocker(ctx, am.keeper)
 }
 
+// module.HasInvariants
+
+func (am AppModule) RegisterInvariants(ir sdk.InvariantRegistry) {
+	keeper.RegisterInvariants(ir, am.keeper)
+}
+
 // Get the root tx command of this module
 func (AppModule) GetTxCmd() *cobra.Command {
 	return cli.GetTxCmd()