diff --git a/src/policy/fees.cpp b/src/policy/fees.cpp
index b9476407cf..ca774cd74b 100644
--- a/src/policy/fees.cpp
+++ b/src/policy/fees.cpp
@@ -1043,5 +1043,5 @@ CAmount FeeFilterRounder::round(CAmount currentMinFee)
     if ((it != feeset.begin() && insecure_rand.rand32() % 3 != 0) || it == feeset.end()) {
         it--;
     }
-    return *it;
+    return static_cast<CAmount>(*it);
 }
diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp
index 7faf216047..e0be817048 100644
--- a/src/rpc/net.cpp
+++ b/src/rpc/net.cpp
@@ -146,7 +146,7 @@ UniValue getpeerinfo(const JSONRPCRequest& request)
         obj.push_back(Pair("timeoffset", stats.nTimeOffset));
         if (stats.dPingTime > 0.0)
             obj.push_back(Pair("pingtime", stats.dPingTime));
-        if (stats.dMinPing < std::numeric_limits<int64_t>::max()/1e6)
+        if (stats.dMinPing < static_cast<double>(std::numeric_limits<int64_t>::max())/1e6)
             obj.push_back(Pair("minping", stats.dMinPing));
         if (stats.dPingWait > 0.0)
             obj.push_back(Pair("pingwait", stats.dPingWait));
diff --git a/src/txmempool.h b/src/txmempool.h
index b07886579c..929d223588 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -507,7 +507,7 @@ public:
      * check does nothing.
      */
     void check(const CCoinsViewCache *pcoins) const;
-    void setSanityCheck(double dFrequency = 1.0) { nCheckFrequency = dFrequency * 4294967295.0; }
+    void setSanityCheck(double dFrequency = 1.0) { nCheckFrequency = static_cast<uint32_t>(dFrequency * 4294967295.0); }
 
     // addUnchecked must updated state for all ancestors of a given transaction,
     // to track size/count of descendant transactions.  First version of
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index d376de2337..1d163a2bbb 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -390,11 +390,11 @@ bool CWallet::ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase,
             {
                 int64_t nStartTime = GetTimeMillis();
                 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
-                pMasterKey.second.nDeriveIterations = pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime)));
+                pMasterKey.second.nDeriveIterations = static_cast<unsigned int>(pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime))));
 
                 nStartTime = GetTimeMillis();
                 crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
-                pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
+                pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + static_cast<unsigned int>(pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime)))) / 2;
 
                 if (pMasterKey.second.nDeriveIterations < 25000)
                     pMasterKey.second.nDeriveIterations = 25000;
@@ -595,11 +595,11 @@ bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
     CCrypter crypter;
     int64_t nStartTime = GetTimeMillis();
     crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
-    kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime));
+    kMasterKey.nDeriveIterations = static_cast<unsigned int>(2500000 / ((double)(GetTimeMillis() - nStartTime)));
 
     nStartTime = GetTimeMillis();
     crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
-    kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
+    kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + static_cast<unsigned int>(kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime)))) / 2;
 
     if (kMasterKey.nDeriveIterations < 25000)
         kMasterKey.nDeriveIterations = 25000;