diff --git a/src/governor.ts b/src/governor.ts
index 86f7526..857c5f1 100644
--- a/src/governor.ts
+++ b/src/governor.ts
@@ -9,6 +9,7 @@ import {
   buildContractCallTx,
   simulateReadOnly,
   scValToI128,
+  scValToU32,
   scValToU64,
   NETWORK_PASSPHRASE,
   DEFAULT_RPC,
@@ -65,8 +66,9 @@ function parseGovernorConfig(val: xdr.ScVal): GovernorConfig {
     m[k] = e.val();
   }
   return {
-    feeBps:             m['fee_bps']?.u32() ?? 0,
+    feeBps:             m['fee_bps'] ? scValToU32(m['fee_bps']) : 0,
     minDurationSeconds: m['min_duration_seconds'] ? Number(scValToU64(m['min_duration_seconds'])) : 0,
+    maxDurationSeconds: m['max_duration_seconds'] ? Number(scValToU64(m['max_duration_seconds'])) : 0,
     maxRatePerSecond:   m['max_rate_per_second'] ? scValToI128(m['max_rate_per_second']) : 0n,
     // exactOptionalPropertyTypes forbids assigning `undefined` to an optional
     // key directly — the key must be entirely absent instead, hence the
diff --git a/src/indexer.ts b/src/indexer.ts
index 16968b3..1a451ab 100644
--- a/src/indexer.ts
+++ b/src/indexer.ts
@@ -1,5 +1,6 @@
 import { ConduitError, UNKNOWN_CONTRACT_ERROR_CODE } from './errors.js';
 import { IndexerTimeoutError, OperationAbortedError } from './errors.js';
+import { bigintSafeStringify } from './utils.js';
 
 export interface GraphQLQueryOptions {
   query: string;
@@ -206,7 +207,7 @@ export class GraphQLIndexer {
       fetchFn,
       this.endpoint,
       headers,
-      JSON.stringify(payload),
+      JSON.stringify({ ...payload, variables: bigintSafeStringify(payload.variables) }),
       timeoutMs,
       callerSignal,
     );
@@ -407,7 +408,7 @@ export class GraphQLIndexer {
             type: 'subscribe',
             payload: {
               query: options.query,
-              variables,
+              variables: bigintSafeStringify(variables),
             },
           });
         } catch (err) {
@@ -493,7 +494,7 @@ export class GraphQLIndexer {
         fetchFn(this.endpoint, {
           method: 'POST',
           headers,
-          body: JSON.stringify({ query: options.query, variables }),
+          body: JSON.stringify({ query: options.query, variables: bigintSafeStringify(variables) }),
           signal: abortController.signal,
         })
           .then(async (response: Response) => {
diff --git a/src/soroban.ts b/src/soroban.ts
index b85607b..63d98a6 100644
--- a/src/soroban.ts
+++ b/src/soroban.ts
@@ -305,7 +305,7 @@ export async function getTokenDecimals(
   const promise = (async () => {
     const tx  = await buildContractCallTx(rpcUrl, passphrase, callerAddr, tokenId, 'decimals', []);
     const val = await simulateReadOnly(rpcUrl, passphrase, tx);
-    return val.u32();
+    return scValToU32(val);
   })();
 
   _tokenDecimalsCache.set(cacheKey, promise);
diff --git a/src/types/index.ts b/src/types/index.ts
index 7ab37ec..3be6bef 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -144,6 +144,7 @@ export interface GovernorConfig {
   feeBps:              number;
   feeRecipient?:       string;
   minDurationSeconds:  number;
+  maxDurationSeconds:  number;
   maxRatePerSecond:    bigint;
   factoryAddress?:     string;
 }
diff --git a/src/utils.ts b/src/utils.ts
index 162e8c2..18254b2 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -37,16 +37,18 @@ export function toStroops(amount: string, decimals = 7): bigint {
 
 /** Convert stroops (bigint) to a display amount string */
 export function fromStroops(stroops: bigint, decimals = 7): string {
+  const neg = stroops < 0n;
+  const abs = neg ? -stroops : stroops;
   const factor = pow10(decimals);
-  const whole = stroops / factor;
-  const rem = stroops % factor;
+  const whole = abs / factor;
+  const rem = abs % factor;
   const frac = rem.toString().padStart(decimals, '0');
   let end = frac.length;
   while (end > 1 && frac.charCodeAt(end - 1) === 48) {
     end--;
   }
   const trimmed = frac.slice(0, end);
-  return `${whole}.${trimmed}`;
+  return `${neg ? '-' : ''}${whole}.${trimmed}`;
 }
 
 /**