diff --git a/hivemind.go b/hivemind.go
index d5a97f5..d076c80 100644
--- a/hivemind.go
+++ b/hivemind.go
@@ -37,7 +37,7 @@ func newHivemind(conf hivemindConfig) (h *hivemind) {
 
 	for i, entry := range entries {
 		if len(procNames) == 0 || stringsContain(procNames, entry.Name) {
-			h.procs = append(h.procs, newProcess(entry.Name, entry.Command, baseColor+i, conf.Root, h.output))
+			h.procs = append(h.procs, newProcess(entry.Name, entry.Command, baseColor+i, conf.Root, entry.Port, h.output))
 		}
 	}
 
diff --git a/process.go b/process.go
index 365bde3..595fc68 100644
--- a/process.go
+++ b/process.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"os"
 	"os/exec"
 	"syscall"
@@ -15,7 +16,7 @@ type process struct {
 	output *multiOutput
 }
 
-func newProcess(name, command string, color int, root string, output *multiOutput) (proc *process) {
+func newProcess(name, command string, color int, root string, port int, output *multiOutput) (proc *process) {
 	proc = &process{
 		exec.Command("/bin/sh", "-c", command),
 		name,
@@ -24,6 +25,7 @@ func newProcess(name, command string, color int, root string, output *multiOutpu
 	}
 
 	proc.Dir = root
+	proc.Env = append(os.Environ(), fmt.Sprintf("PORT=%d", port))
 
 	proc.output.Connect(proc)
 
diff --git a/procfile.go b/procfile.go
index 6de8655..48021d7 100644
--- a/procfile.go
+++ b/procfile.go
@@ -4,13 +4,12 @@ import (
 	"bufio"
 	"os"
 	"regexp"
-	"strconv"
-	"strings"
 )
 
 type procfileEntry struct {
 	Name    string
 	Command string
+	Port    int
 }
 
 func parseProcfile(path string, portBase, portStep int) (entries []procfileEntry) {
@@ -40,10 +39,7 @@ func parseProcfile(path string, portBase, portStep int) (entries []procfileEntry
 		}
 		names[name] = true
 
-		entries = append(entries, procfileEntry{
-			name,
-			strings.Replace(cmd, "$PORT", strconv.Itoa(port), -1),
-		})
+		entries = append(entries, procfileEntry{name, cmd, port})
 
 		port += portStep
 	}