diff --git a/VERSION b/VERSION
index 867bf6b..2136ac9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.0-rc1
+1.0.0-rc2
diff --git a/doc/e9patch.1 b/doc/e9patch.1
index 3143e0e..3982604 100644
--- a/doc/e9patch.1
+++ b/doc/e9patch.1
@@ -183,6 +183,6 @@ Default: \fBfalse\fR (disabled)
 \fB\-\-version\fR
 Print the version and exit.
 .SH "SEE ALSO"
-\fIe9tool\fR(1), \fIe9compile\fR, \fIe9afl\fR(1), \fIredfat\fR(1)
+\fIe9tool\fR(1), \fIe9compile\fR(1), \fIe9afl\fR(1), \fIredfat\fR(1)
 .SH AUTHOR
 \fBe9patch\fR is written by Gregory J. Duck <gregory@comp.nus.edu.sg>.
diff --git a/src/e9patch/e9api.cpp b/src/e9patch/e9api.cpp
index b3258e5..75ab131 100644
--- a/src/e9patch/e9api.cpp
+++ b/src/e9patch/e9api.cpp
@@ -181,7 +181,7 @@ static void queuePatch(Binary *B, Instr *I, const Trampoline *T)
  */
 static Binary *parseBinary(const Message &msg)
 {
-    const char *filename = nullptr;
+    const char *filename = nullptr, *version = nullptr;
     Mode mode = MODE_ELF_EXE;
     bool have_mode = false, dup = false;
     for (unsigned i = 0; i < msg.num_params; i++)
@@ -197,6 +197,10 @@ static Binary *parseBinary(const Message &msg)
                 mode = (Mode)msg.params[i].value.integer;
                 have_mode = true;
                 break;
+            case PARAM_VERSION:
+                dup = dup || (version != nullptr);
+                version = msg.params[i].value.string;
+                break;
             default:
                 break;
         }
@@ -204,6 +208,13 @@ static Binary *parseBinary(const Message &msg)
     if (filename == nullptr)
         error("failed to parse \"binary\" message (id=%u); missing "
             "\"filename\" parameter", msg.id);
+    if (version == nullptr)
+        error("failed to parse \"binary\" message (id=%u); missing "
+            "\"version\" parameter", msg.id);
+    if (strcmp(version, STRING(VERSION)) != 0)
+        error("failed to parse \"binary\" message (id=%u); invalid "
+            "version \"%s\"; expected \"%s\"", msg.id, version,
+            STRING(VERSION));
     if (dup)
         error("failed to parse \"binary\" message (id=%u); duplicate "
             "parameters detected", msg.id);
diff --git a/src/e9patch/e9json.cpp b/src/e9patch/e9json.cpp
index f60816f..5aa645e 100644
--- a/src/e9patch/e9json.cpp
+++ b/src/e9patch/e9json.cpp
@@ -505,6 +505,7 @@ static bool validateParam(Method method, ParamName paramName)
             {
                 case PARAM_FILENAME:
                 case PARAM_MODE:
+                case PARAM_VERSION:
                     return true;
                 default:
                     return false;
@@ -1113,6 +1114,10 @@ static void parseParams(Parser &parser, Message &msg)
                 else if (strcmp(parser.s, "template") == 0)
                     name = PARAM_TEMPLATE;
                 break;
+            case 'v':
+                if (strcmp(parser.s, "version") == 0)
+                    name = PARAM_VERSION;
+                break;
         }
         expectToken(parser, ':');
         if (!validateParam(msg.method, name))
@@ -1144,6 +1149,7 @@ static void parseParams(Parser &parser, Message &msg)
                     break;
                 case PARAM_FILENAME:
                 case PARAM_NAME:
+                case PARAM_VERSION:
                     expectToken(parser, TOKEN_STRING);
                     value.string = dupString(parser.s);
                     break;
diff --git a/src/e9patch/e9json.h b/src/e9patch/e9json.h
index 82afcd1..518228a 100644
--- a/src/e9patch/e9json.h
+++ b/src/e9patch/e9json.h
@@ -62,6 +62,7 @@ enum ParamName
     PARAM_PROTECTION,
     PARAM_TEMPLATE,
     PARAM_TRAMPOLINE,
+    PARAM_VERSION,
 };
 
 /*
diff --git a/src/e9tool/e9frontend.cpp b/src/e9tool/e9frontend.cpp
index 2a8daf9..a88109b 100644
--- a/src/e9tool/e9frontend.cpp
+++ b/src/e9tool/e9frontend.cpp
@@ -278,6 +278,9 @@ unsigned e9tool::sendBinaryMessage(FILE *out, const char *mode,
     const char *filename)
 {
     sendMessageHeader(out, "binary");
+    sendParamHeader(out, "version");
+    sendString(out, STRING(VERSION));
+    sendSeparator(out);
     sendParamHeader(out, "filename");
     sendString(out, filename);
     sendSeparator(out);