diff --git a/encfs/FileUtils.cpp b/encfs/FileUtils.cpp
index 0431501..58e91a9 100644
--- a/encfs/FileUtils.cpp
+++ b/encfs/FileUtils.cpp
@@ -644,7 +644,7 @@ static Cipher::CipherAlgorithm selectCipherAlgorithm() {
     cout << "\n" << _("Enter the number corresponding to your choice: ");
     char answer[10];
     char *res = fgets(answer, sizeof(answer), stdin);
-    int cipherNum = (res == nullptr ? 0 : atoi(answer));
+    int cipherNum = (res == nullptr ? 0 : (int)strtol(answer, nullptr, 10));
     cout << "\n";
 
     if (cipherNum < 1 || cipherNum > (int)algorithms.size()) {
@@ -688,7 +688,7 @@ static Interface selectNameCoding() {
     cout << "\n" << _("Enter the number corresponding to your choice: ");
     char answer[10];
     char *res = fgets(answer, sizeof(answer), stdin);
-    int algNum = (res == nullptr ? 0 : atoi(answer));
+    int algNum = (res == nullptr ? 0 : (int)strtol(answer, nullptr, 10));
     cout << "\n";
 
     if (algNum < 1 || algNum > (int)algorithms.size()) {
@@ -755,7 +755,7 @@ static int selectKeySize(const Cipher::CipherAlgorithm &alg) {
 
   char answer[10];
   char *res = fgets(answer, sizeof(answer), stdin);
-  int keySize = (res == nullptr ? 0 : atoi(answer));
+  int keySize = (res == nullptr ? 0 : (int)strtol(answer, nullptr, 10));
   cout << "\n";
 
   keySize = alg.keyLength.closest(keySize);
@@ -795,8 +795,8 @@ static int selectBlockSize(const Cipher::CipherAlgorithm &alg) {
   char *res = fgets(answer, sizeof(answer), stdin);
   cout << "\n";
 
-  if (res != nullptr && atoi(answer) >= alg.blockSize.min()) {
-    blockSize = atoi(answer);
+  if (res != nullptr && (int)strtol(answer, nullptr, 10) >= alg.blockSize.min()) {
+    blockSize = (int)strtol(answer, nullptr, 10);
   }
 
   blockSize = alg.blockSize.closest(blockSize);
@@ -900,7 +900,7 @@ static void selectBlockMAC(int *macBytes, int *macRandBytes, bool forceMac) {
   char *res = fgets(answer, sizeof(answer), stdin);
   cout << "\n";
 
-  randSize = (res == nullptr ? 0 : atoi(answer));
+  randSize = (res == nullptr ? 0 : (int)strtol(answer, nullptr, 10));
   if (randSize < 0) {
     randSize = 0;
   }
diff --git a/encfs/XmlReader.cpp b/encfs/XmlReader.cpp
index 18d0cef..770cc96 100644
--- a/encfs/XmlReader.cpp
+++ b/encfs/XmlReader.cpp
@@ -23,6 +23,7 @@
 #include <algorithm>  // for remove_if
 #include <cstring>    // for NULL
 #include <fstream>    // for ifstream
+#include <limits>
 #include <memory>     // for shared_ptr
 #include <sstream>    // for ostringstream
 
@@ -60,7 +61,15 @@ bool XmlValue::read(const char *path, int *out) const {
     return false;
   }
 
-  *out = atoi(value->text().c_str());
+  char * e;
+  long lout = strtol(value->text().c_str(), &e, 10);
+  if (*e != '\0') {
+    return false;
+  }
+  if (lout < std::numeric_limits<int>::min() || lout > std::numeric_limits<int>::max()) {
+    return false;
+  }
+  *out = (int)lout;
   return true;
 }
 
@@ -70,8 +79,9 @@ bool XmlValue::read(const char *path, long *out) const {
     return false;
   }
 
-  *out = atol(value->text().c_str());
-  return true;
+  char * e;
+  *out = strtol(value->text().c_str(), &e, 10);
+  return (*e == '\0');
 }
 
 bool XmlValue::read(const char *path, double *out) const {
@@ -80,8 +90,9 @@ bool XmlValue::read(const char *path, double *out) const {
     return false;
   }
 
-  *out = atof(value->text().c_str());
-  return true;
+  char * e;
+  *out = strtod(value->text().c_str(), &e);
+  return (*e == '\0');
 }
 
 bool XmlValue::read(const char *path, bool *out) const {
@@ -90,8 +101,9 @@ bool XmlValue::read(const char *path, bool *out) const {
     return false;
   }
 
-  *out = (atoi(value->text().c_str()) != 0);
-  return true;
+  char * e;
+  *out = (strtol(value->text().c_str(), &e, 10) != 0);
+  return (*e == '\0');
 }
 
 bool XmlValue::readB64(const char *path, unsigned char *data,