diff --git a/source/pdo_sqlsrv/pdo_dbh.cpp b/source/pdo_sqlsrv/pdo_dbh.cpp
index 4cac40b46..5bbfee696 100644
--- a/source/pdo_sqlsrv/pdo_dbh.cpp
+++ b/source/pdo_sqlsrv/pdo_dbh.cpp
@@ -155,6 +155,7 @@ struct pdo_encrypt_set_func
         const char TRUE_VALUE_2[] = "1";
         const char FALSE_VALUE_1[] = "false";
         const char FALSE_VALUE_2[] = "0";
+        transform(val_str.begin(), val_str.end(), val_str.begin(), ::tolower);
 
         // For backward compatibility, convert true/1 to yes and false/0 to no
         std::string attr;
diff --git a/source/shared/core_conn.cpp b/source/shared/core_conn.cpp
index 23212f065..7a9cd1032 100644
--- a/source/shared/core_conn.cpp
+++ b/source/shared/core_conn.cpp
@@ -1147,6 +1147,7 @@ size_t core_str_zval_is_true(_Inout_ zval* value_z)
 
     const char TRUE_VALUE_1[] = "true";
     const char TRUE_VALUE_2[] = "1";
+    transform(val_str.begin(), val_str.end(), val_str.begin(), ::tolower);
     if (!val_str.compare(TRUE_VALUE_1) || !val_str.compare(TRUE_VALUE_2)) {
         return 1; // true
     }
diff --git a/source/sqlsrv/conn.cpp b/source/sqlsrv/conn.cpp
index c3f661ca8..27ef4b914 100644
--- a/source/sqlsrv/conn.cpp
+++ b/source/sqlsrv/conn.cpp
@@ -135,7 +135,16 @@ struct bool_conn_str_func {
     {
         char temp_str[MAX_CONN_VALSTRING_LEN];
 
-        snprintf(temp_str, MAX_CONN_VALSTRING_LEN, "%s={%s};", option->odbc_name, (zend_is_true(value) ? "yes" : "no"));
+        if (Z_TYPE_P(value) != IS_STRING) {
+            convert_to_string(value);
+        }
+        const char *value_str = Z_STRVAL_P(value);
+
+        snprintf(temp_str,
+                 MAX_CONN_VALSTRING_LEN,
+                 "%s={%s};",
+                 option->odbc_name,
+                 ((stricmp(value_str, "true") == 0 || stricmp(value_str, "1") == 0) ? "yes" : "no"));
         conn_str += temp_str;
     }
 };